NOAA SWPC Alerts, Watches en Waarschuwingen

Het National Oceanic and Atmospheric Administration Space Weather Prediction Center (NOAA SWPC) is de officiële ruimteweer instantie van de Verenigde Staten die alerts, watches en waarschuwingen verstuurt met betrekking tot het ruimteweer. Hieronder zal je de meest recente ruimteweer alerts, watches en waarschuwingen vinden van het NOAA SWPC.

zondag 19 mei 2024

13:20 UTC

Space Weather Message Code: WARK04
Serial Number: 4615
Issue Time: 2024 May 19 1320 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 May 19 1320 UTC
Valid To: 2024 May 19 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

zaterdag 18 mei 2024

19:52 UTC

Space Weather Message Code: WATA20
Serial Number: 999
Issue Time: 2024 May 18 1952 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
May 19: None (Below G1) May 20: G1 (Minor) May 21: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:56 UTC

Space Weather Message Code: WARK05
Serial Number: 1884
Issue Time: 2024 May 18 0556 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1883
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 18 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

vrijdag 17 mei 2024

23:01 UTC

Space Weather Message Code: WARK06
Serial Number: 526
Issue Time: 2024 May 17 2301 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 525
Valid From: 2024 May 17 1901 UTC
Now Valid Until: 2024 May 18 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

22:35 UTC

Space Weather Message Code: ALTK05
Serial Number: 1597
Issue Time: 2024 May 17 2235 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 17 2230 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

21:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4614
Issue Time: 2024 May 17 2156 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4613
Valid From: 2024 May 17 1300 UTC
Now Valid Until: 2024 May 18 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

21:56 UTC

Space Weather Message Code: WARK05
Serial Number: 1883
Issue Time: 2024 May 17 2156 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1882
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 18 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

21:43 UTC

Space Weather Message Code: ALTTP4
Serial Number: 646
Issue Time: 2024 May 17 2143 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 17 2111 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

21:39 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1303
Issue Time: 2024 May 17 2139 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 17 2103 UTC
Estimated Velocity: 425 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

21:33 UTC

Space Weather Message Code: SUMXM5
Serial Number: 227
Issue Time: 2024 May 17 2133 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 17 2033 UTC
Maximum Time: 2024 May 17 2108 UTC
End Time: 2024 May 17 2126 UTC
X-ray Class: M7.2
Optical Class: 2b
Location: S13E50
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

21:05 UTC

Space Weather Message Code: ALTXMF
Serial Number: 386
Issue Time: 2024 May 17 2105 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 17 2102 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

19:29 UTC

Space Weather Message Code: ALTK06
Serial Number: 573
Issue Time: 2024 May 17 1929 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 17 1928 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

19:02 UTC

Space Weather Message Code: WARK06
Serial Number: 525
Issue Time: 2024 May 17 1902 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2024 May 17 1901 UTC
Valid To: 2024 May 17 2359 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

18:34 UTC

Space Weather Message Code: ALTK05
Serial Number: 1596
Issue Time: 2024 May 17 1834 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 17 1834 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:49 UTC

Space Weather Message Code: WARK05
Serial Number: 1882
Issue Time: 2024 May 17 1749 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1881
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 17 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:49 UTC

Space Weather Message Code: WARK04
Serial Number: 4613
Issue Time: 2024 May 17 1749 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4612
Valid From: 2024 May 17 1300 UTC
Now Valid Until: 2024 May 18 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

17:05 UTC

Space Weather Message Code: ALTK05
Serial Number: 1595
Issue Time: 2024 May 17 1705 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 17 1701 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:45 UTC

Space Weather Message Code: ALTK04
Serial Number: 2448
Issue Time: 2024 May 17 1645 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 May 17 1639 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

13:42 UTC

Space Weather Message Code: SUMSUD
Serial Number: 271
Issue Time: 2024 May 17 1342 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2024 May 17 1325 UTC
Deviation: 11 nT
Station: BOU

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

13:04 UTC

Space Weather Message Code: WARK05
Serial Number: 1881
Issue Time: 2024 May 17 1304 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 May 17 1305 UTC
Valid To: 2024 May 17 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

13:00 UTC

Space Weather Message Code: WARK04
Serial Number: 4612
Issue Time: 2024 May 17 1300 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 May 17 1300 UTC
Valid To: 2024 May 17 2100 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

12:57 UTC

Space Weather Message Code: WARSUD
Serial Number: 224
Issue Time: 2024 May 17 1257 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2024 May 17 1315 UTC
Valid To: 2024 May 17 1345 UTC
IP Shock Passage Observed: 2024 May 17 1245 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

11:37 UTC

Space Weather Message Code: SUMPX1
Serial Number: 112
Issue Time: 2024 May 17 1137 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 13 1400 UTC
Maximum Time: 2024 May 14 0520 UTC
End Time: 2024 May 16 1455 UTC
Maximum 10MeV Flux: 121 pfu
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

donderdag 16 mei 2024

17:37 UTC

Space Weather Message Code: WARK04
Serial Number: 4611
Issue Time: 2024 May 16 1737 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4610
Valid From: 2024 May 16 0456 UTC
Now Valid Until: 2024 May 17 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

15:08 UTC

Space Weather Message Code: ALTK05
Serial Number: 1594
Issue Time: 2024 May 16 1508 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 16 1459 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:22 UTC

Space Weather Message Code: WARPX1
Serial Number: 562
Issue Time: 2024 May 16 1422 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 561
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 16 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

11:50 UTC

Space Weather Message Code: ALTK05
Serial Number: 1593
Issue Time: 2024 May 16 1150 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 16 1143 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:38 UTC

Space Weather Message Code: ALTK06
Serial Number: 572
Issue Time: 2024 May 16 0838 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 16 0834 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

08:22 UTC

Space Weather Message Code: WARK06
Serial Number: 524
Issue Time: 2024 May 16 0822 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2024 May 16 0821 UTC
Valid To: 2024 May 16 1500 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

07:39 UTC

Space Weather Message Code: ALTK05
Serial Number: 1592
Issue Time: 2024 May 16 0739 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 16 0733 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

06:43 UTC

Space Weather Message Code: SUMSUD
Serial Number: 270
Issue Time: 2024 May 16 0643 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2024 May 16 0620 UTC
Deviation: 146 nT
Station: Sitka

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

06:38 UTC

Space Weather Message Code: WARK04
Serial Number: 4610
Issue Time: 2024 May 16 0638 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4609
Valid From: 2024 May 16 0456 UTC
Now Valid Until: 2024 May 16 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

06:33 UTC

Space Weather Message Code: WARK05
Serial Number: 1880
Issue Time: 2024 May 16 0633 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 May 16 0632 UTC
Valid To: 2024 May 16 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

06:28 UTC

Space Weather Message Code: ALTK04
Serial Number: 2447
Issue Time: 2024 May 16 0628 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 May 16 0620 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:26 UTC

Space Weather Message Code: WARSUD
Serial Number: 223
Issue Time: 2024 May 16 0526 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2024 May 16 0545 UTC
Valid To: 2024 May 16 0615 UTC
IP Shock Passage Observed: 2024 May 16 0515 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

04:57 UTC

Space Weather Message Code: WARK04
Serial Number: 4609
Issue Time: 2024 May 16 0457 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 May 16 0456 UTC
Valid To: 2024 May 16 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

woensdag 15 mei 2024

21:46 UTC

Space Weather Message Code: WARPX1
Serial Number: 561
Issue Time: 2024 May 15 2146 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 560
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 16 1500 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

20:53 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1302
Issue Time: 2024 May 15 2053 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 15 2037 UTC
Estimated Velocity: 680 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

15:33 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3396
Issue Time: 2024 May 15 1533 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 May 15 1525 UTC
Station: GOES16




Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

15:13 UTC

Space Weather Message Code: SUMX01
Serial Number: 158
Issue Time: 2024 May 15 1513 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 15 1420 UTC
Maximum Time: 2024 May 15 1438 UTC
End Time: 2024 May 15 1451 UTC
X-ray Class: X2.9
Location: S07E90
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

15:09 UTC

Space Weather Message Code: ALTTP4
Serial Number: 645
Issue Time: 2024 May 15 1509 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 15 1427 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

15:08 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1301
Issue Time: 2024 May 15 1508 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 15 1427 UTC
Estimated Velocity: 1064 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

14:27 UTC

Space Weather Message Code: ALTXMF
Serial Number: 385
Issue Time: 2024 May 15 1427 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 15 1424 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

13:29 UTC

Space Weather Message Code: SUMPX2
Serial Number: 51
Issue Time: 2024 May 15 1329 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 14 0315 UTC
Maximum Time: 2024 May 14 0505 UTC
End Time: 2024 May 14 0650 UTC
Maximum 10MeV Flux: 121 pfu
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

11:49 UTC

Space Weather Message Code: SUM10R
Serial Number: 804
Issue Time: 2024 May 15 1149 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 15 1039 UTC
Maximum Time: 2024 May 15 1044 UTC
End Time: 2024 May 15 1048 UTC
Duration: 9 minutes
Peak Flux: 250 sfu
Latest Penticton Noon Flux: 220 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

09:05 UTC

Space Weather Message Code: SUMX01
Serial Number: 157
Issue Time: 2024 May 15 0905 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 15 0818 UTC
Maximum Time: 2024 May 15 0837 UTC
End Time: 2024 May 15 0852 UTC
X-ray Class: X3.4
Optical Class: na
Location: S22W90
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

09:03 UTC

Space Weather Message Code: ALTTP4
Serial Number: 644
Issue Time: 2024 May 15 0903 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 15 0827 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

08:46 UTC

Space Weather Message Code: SUM10R
Serial Number: 803
Issue Time: 2024 May 15 0846 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 15 0830 UTC
Maximum Time: 2024 May 15 0831 UTC
End Time: 2024 May 15 0835 UTC
Duration: 5 minutes
Peak Flux: 450 sfu
Latest Penticton Noon Flux: 220 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

08:32 UTC

Space Weather Message Code: ALTXMF
Serial Number: 384
Issue Time: 2024 May 15 0832 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 15 0830 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

dinsdag 14 mei 2024

20:16 UTC

Space Weather Message Code: WARPX1
Serial Number: 560
Issue Time: 2024 May 14 2016 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 559
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 15 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

18:43 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1300
Issue Time: 2024 May 14 1843 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 14 1730 UTC
Estimated Velocity: 610 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

17:16 UTC

Space Weather Message Code: SUMX01
Serial Number: 156
Issue Time: 2024 May 14 1716 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 14 1646 UTC
Maximum Time: 2024 May 14 1651 UTC
End Time: 2024 May 14 1702 UTC
X-ray Class: X8.7
Location: S22W90
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

17:14 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1299
Issue Time: 2024 May 14 1714 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 14 1653 UTC
Estimated Velocity: 497 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

17:13 UTC

Space Weather Message Code: SUM10R
Serial Number: 802
Issue Time: 2024 May 14 1713 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 14 1646 UTC
Maximum Time: 2024 May 14 1647 UTC
End Time: 2024 May 14 1653 UTC
Duration: 7 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 215 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

17:09 UTC

Space Weather Message Code: ALTTP4
Serial Number: 643
Issue Time: 2024 May 14 1709 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 14 1647 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

16:50 UTC

Space Weather Message Code: ALTXMF
Serial Number: 383
Issue Time: 2024 May 14 1650 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 14 1647 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

13:14 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1298
Issue Time: 2024 May 14 1314 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 14 1245 UTC
Estimated Velocity: 797 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

13:12 UTC

Space Weather Message Code: SUMX01
Serial Number: 155
Issue Time: 2024 May 14 1312 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 14 1240 UTC
Maximum Time: 2024 May 14 1255 UTC
End Time: 2024 May 14 1305 UTC
X-ray Class: X1.2
Location: S21W90
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

12:52 UTC

Space Weather Message Code: ALTXMF
Serial Number: 382
Issue Time: 2024 May 14 1252 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 14 1249 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

04:17 UTC

Space Weather Message Code: ALTPX2
Serial Number: 72
Issue Time: 2024 May 14 0417 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 14 0335 UTC
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.

03:00 UTC

Space Weather Message Code: ALTTP4
Serial Number: 642
Issue Time: 2024 May 14 0300 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 14 0220 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

02:46 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1297
Issue Time: 2024 May 14 0246 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 14 0207 UTC
Estimated Velocity: 447 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

02:36 UTC

Space Weather Message Code: SUMX01
Serial Number: 154
Issue Time: 2024 May 14 0236 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 14 0203 UTC
Maximum Time: 2024 May 14 0209 UTC
End Time: 2024 May 14 0219 UTC
X-ray Class: X1.7
Location: S19W87
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

02:20 UTC

Space Weather Message Code: SUM10R
Serial Number: 801
Issue Time: 2024 May 14 0220 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 14 0205 UTC
Maximum Time: 2024 May 14 0205 UTC
End Time: 2024 May 14 0206 UTC
Duration: 1 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 215 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

02:10 UTC

Space Weather Message Code: ALTXMF
Serial Number: 381
Issue Time: 2024 May 14 0210 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 14 0206 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

maandag 13 mei 2024

23:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4608
Issue Time: 2024 May 13 2356 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4607
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 14 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

21:27 UTC

Space Weather Message Code: WARPX1
Serial Number: 559
Issue Time: 2024 May 13 2127 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 558
Valid From: 2024 May 13 1328 UTC
Now Valid Until: 2024 May 14 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

21:03 UTC

Space Weather Message Code: WATA30
Serial Number: 232
Issue Time: 2024 May 13 2103 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
May 14: G2 (Moderate) May 15: G1 (Minor) May 16: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

14:55 UTC

Space Weather Message Code: WARK05
Serial Number: 1879
Issue Time: 2024 May 13 1455 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1878
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:08 UTC

Space Weather Message Code: ALTPX1
Serial Number: 347
Issue Time: 2024 May 13 1408 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 13 1407 UTC
NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

13:28 UTC

Space Weather Message Code: WARPX1
Serial Number: 558
Issue Time: 2024 May 13 1328 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2024 May 13 1328 UTC
Valid To: 2024 May 13 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

11:12 UTC

Space Weather Message Code: SUMXM5
Serial Number: 226
Issue Time: 2024 May 13 1112 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 13 0848 UTC
Maximum Time: 2024 May 13 0944 UTC
End Time: 2024 May 13 1057 UTC
X-ray Class: M6.6
Location: S20W90
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

10:25 UTC

Space Weather Message Code: SUM10R
Serial Number: 800
Issue Time: 2024 May 13 1025 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 13 0917 UTC
Maximum Time: 2024 May 13 0926 UTC
End Time: 2024 May 13 1009 UTC
Duration: 52 minutes
Peak Flux: 1200 sfu
Latest Penticton Noon Flux: 222 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

09:50 UTC

Space Weather Message Code: ALTTP4
Serial Number: 641
Issue Time: 2024 May 13 0950 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 13 0916 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

09:49 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1296
Issue Time: 2024 May 13 0949 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 13 0906 UTC
Estimated Velocity: 683 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

09:42 UTC

Space Weather Message Code: ALTXMF
Serial Number: 380
Issue Time: 2024 May 13 0942 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 13 0939 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

04:02 UTC

Space Weather Message Code: ALTK06
Serial Number: 571
Issue Time: 2024 May 13 0402 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 13 0355 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

03:28 UTC

Space Weather Message Code: ALTK05
Serial Number: 1591
Issue Time: 2024 May 13 0328 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 13 0324 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

02:59 UTC

Space Weather Message Code: ALTK06
Serial Number: 570
Issue Time: 2024 May 13 0259 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 13 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

01:33 UTC

Space Weather Message Code: SUMPX1
Serial Number: 111
Issue Time: 2024 May 13 0133 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 10 1335 UTC
Maximum Time: 2024 May 10 1745 UTC
End Time: 2024 May 12 1235 UTC
Maximum 10MeV Flux: 207 pfu
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

01:20 UTC

Space Weather Message Code: ALTK05
Serial Number: 1590
Issue Time: 2024 May 13 0120 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 13 0120 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

zondag 12 mei 2024

22:43 UTC

Space Weather Message Code: WARK07
Serial Number: 107
Issue Time: 2024 May 12 2243 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 106
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 13 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

22:38 UTC

Space Weather Message Code: ALTK06
Serial Number: 569
Issue Time: 2024 May 12 2238 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 12 2239 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

22:21 UTC

Space Weather Message Code: ALTK05
Serial Number: 1589
Issue Time: 2024 May 12 2221 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 12 2220 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:46 UTC

Space Weather Message Code: SUMX01
Serial Number: 153
Issue Time: 2024 May 12 1646 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 12 1611 UTC
Maximum Time: 2024 May 12 1626 UTC
End Time: 2024 May 12 1638 UTC
X-ray Class: X1.0
Location: S19W68
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

16:23 UTC

Space Weather Message Code: ALTXMF
Serial Number: 379
Issue Time: 2024 May 12 1623 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 12 1620 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

16:13 UTC

Space Weather Message Code: SUMPC0
Serial Number: 33
Issue Time: 2024 May 12 1613 UTC

SUMMARY: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2024 May 11 0210 UTC
Maximum Time: 2024 May 11 0715 UTC
End Time: 2024 May 12 0030 UTC
Maximum 100MeV Flux: 7 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

11:03 UTC

Space Weather Message Code: SUMPX2
Serial Number: 50
Issue Time: 2024 May 12 1103 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 10 1754 UTC
Maximum Time: 2024 May 11 0910 UTC
End Time: 2024 May 11 1440 UTC
Maximum 10MeV Flux: 207 pfu
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

04:37 UTC

Space Weather Message Code: ALTK07
Serial Number: 155
Issue Time: 2024 May 12 0437 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 12 0433 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

04:21 UTC

Space Weather Message Code: ALTK06
Serial Number: 568
Issue Time: 2024 May 12 0421 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 12 0420 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

03:46 UTC

Space Weather Message Code: ALTK05
Serial Number: 1588
Issue Time: 2024 May 12 0346 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 12 0340 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

03:01 UTC

Space Weather Message Code: ALTK07
Serial Number: 154
Issue Time: 2024 May 12 0301 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 12 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

01:34 UTC

Space Weather Message Code: ALTK06
Serial Number: 567
Issue Time: 2024 May 12 0134 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 12 0133 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

01:17 UTC

Space Weather Message Code: ALTK05
Serial Number: 1587
Issue Time: 2024 May 12 0117 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 12 0110 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

zaterdag 11 mei 2024

21:44 UTC

Space Weather Message Code: ALTK07
Serial Number: 153
Issue Time: 2024 May 11 2144 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 2144 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

21:16 UTC

Space Weather Message Code: ALTK06
Serial Number: 566
Issue Time: 2024 May 11 2116 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 2116 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

21:14 UTC

Space Weather Message Code: ALTK05
Serial Number: 1586
Issue Time: 2024 May 11 2114 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 2111 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:42 UTC

Space Weather Message Code: ALTK07
Serial Number: 152
Issue Time: 2024 May 11 1942 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 1937 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

18:31 UTC

Space Weather Message Code: ALTK06
Serial Number: 565
Issue Time: 2024 May 11 1831 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 1828 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

18:25 UTC

Space Weather Message Code: ALTK05
Serial Number: 1585
Issue Time: 2024 May 11 1825 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 1821 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

18:03 UTC

Space Weather Message Code: ALTTP4
Serial Number: 640
Issue Time: 2024 May 11 1803 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 11 1706 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

17:53 UTC

Space Weather Message Code: WATA99
Serial Number: 7
Issue Time: 2024 May 11 1753 UTC

WATCH: Geomagnetic Storm Category G4 or Greater Predicted

Highest Storm Level Predicted by Day:
May 12: G5 (Extreme) May 13: G3 (Strong) May 14: G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

17:53 UTC

Space Weather Message Code: WARK07
Serial Number: 106
Issue Time: 2024 May 11 1753 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 105
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 12 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

17:53 UTC

Space Weather Message Code: WARK05
Serial Number: 1878
Issue Time: 2024 May 11 1753 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1876
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:53 UTC

Space Weather Message Code: WARK06
Serial Number: 523
Issue Time: 2024 May 11 1753 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 521
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 13 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

16:58 UTC

Space Weather Message Code: SUMXM5
Serial Number: 225
Issue Time: 2024 May 11 1658 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 11 1446 UTC
Maximum Time: 2024 May 11 1525 UTC
End Time: 2024 May 11 1552 UTC
X-ray Class: M8.8
Optical Class: 2b
Location: S19W56
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

16:50 UTC

Space Weather Message Code: ALTK08
Serial Number: 39
Issue Time: 2024 May 11 1650 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 1647 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

15:48 UTC

Space Weather Message Code: ALTK07
Serial Number: 151
Issue Time: 2024 May 11 1548 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 1545 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

15:22 UTC

Space Weather Message Code: ALTK06
Serial Number: 564
Issue Time: 2024 May 11 1522 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 1520 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

15:15 UTC

Space Weather Message Code: ALTK05
Serial Number: 1584
Issue Time: 2024 May 11 1515 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 1511 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

12:40 UTC

Space Weather Message Code: ALTK08
Serial Number: 38
Issue Time: 2024 May 11 1240 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 1237 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

12:36 UTC

Space Weather Message Code: ALTK07
Serial Number: 150
Issue Time: 2024 May 11 1236 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 1228 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

12:30 UTC

Space Weather Message Code: SUMX01
Serial Number: 152
Issue Time: 2024 May 11 1230 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 11 1115 UTC
Maximum Time: 2024 May 11 1144 UTC
End Time: 2024 May 11 1205 UTC
X-ray Class: X1.5
Optical Class: 2b
Location: S22W44
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

12:21 UTC

Space Weather Message Code: ALTK06
Serial Number: 563
Issue Time: 2024 May 11 1221 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 1212 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

12:15 UTC

Space Weather Message Code: ALTK05
Serial Number: 1583
Issue Time: 2024 May 11 1215 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 1206 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

11:39 UTC

Space Weather Message Code: ALTK09
Serial Number: 8
Issue Time: 2024 May 11 1139 UTC

ALERT: Geomagnetic K-index of 9o
Threshold Reached: 2024 May 11 1128 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G5 - Extreme

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 40 degrees Geomagnetic Latitude.
Induced Currents - Widespread voltage control problems and protective system problems may occur; some power grid systems may experience component failures or protective device trips resulting in blackouts or disruption of service. Pipeline currents can reach hundreds of amps.
Spacecraft - Systems may experience anomalies to include: extensive surface charging, unexpected orientation and attitude changes, uplink/downlink errors, and satellite orbit degradation.
Navigation - Satellite navigation (GPS) may be degraded or unavailable for days.
Radio - HF (high frequency) radio propagation may be impossible in many areas for one to two days.
Aurora - Aurora may be seen as low as Florida to southern Texas and southern California.

11:38 UTC

Space Weather Message Code: ALTXMF
Serial Number: 378
Issue Time: 2024 May 11 1138 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 11 1131 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

11:20 UTC

Space Weather Message Code: WARPC0
Serial Number: 102
Issue Time: 2024 May 11 1120 UTC

EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 101
Valid From: 2024 May 11 0205 UTC
Now Valid Until: 2024 May 12 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

11:20 UTC

Space Weather Message Code: WARPX1
Serial Number: 557
Issue Time: 2024 May 11 1120 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 556
Valid From: 2024 May 10 1305 UTC
Now Valid Until: 2024 May 12 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

11:20 UTC

Space Weather Message Code: WARK06
Serial Number: 521
Issue Time: 2024 May 11 1120 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 520
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 12 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

11:20 UTC

Space Weather Message Code: WARK07
Serial Number: 105
Issue Time: 2024 May 11 1120 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 104
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 11 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

11:20 UTC

Space Weather Message Code: WARK05
Serial Number: 1876
Issue Time: 2024 May 11 1120 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1875
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 12 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

11:20 UTC

Space Weather Message Code: WARK04
Serial Number: 4607
Issue Time: 2024 May 11 1120 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4606
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

11:20 UTC

Space Weather Message Code: WATA50
Serial Number: 76
Issue Time: 2024 May 11 1120 UTC

WATCH: Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
May 11: G4 (Severe) May 12: G3 (Strong) May 13: G3 (Strong)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

11:13 UTC

Space Weather Message Code: WARPC0
Serial Number: 101
Issue Time: 2024 May 11 1113 UTC

EXTENDED WARNING: Proton 100MeV Integral Flux above 1pfu expected
Extension to Serial Number: 100
Valid From: 2024 May 11 0205 UTC
Now Valid Until: 2024 May 12 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

09:44 UTC

Space Weather Message Code: ALTK08
Serial Number: 37
Issue Time: 2024 May 11 0944 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0940 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

09:41 UTC

Space Weather Message Code: ALTK07
Serial Number: 149
Issue Time: 2024 May 11 0941 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0937 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

09:28 UTC

Space Weather Message Code: ALTK06
Serial Number: 562
Issue Time: 2024 May 11 0928 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 0926 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

09:16 UTC

Space Weather Message Code: ALTK05
Serial Number: 1582
Issue Time: 2024 May 11 0916 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 0908 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

07:09 UTC

Space Weather Message Code: ALTK08
Serial Number: 36
Issue Time: 2024 May 11 0709 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0703 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

06:49 UTC

Space Weather Message Code: ALTK07
Serial Number: 148
Issue Time: 2024 May 11 0649 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0644 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

06:33 UTC

Space Weather Message Code: ALTK06
Serial Number: 561
Issue Time: 2024 May 11 0633 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 0626 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

06:19 UTC

Space Weather Message Code: ALTK05
Serial Number: 1581
Issue Time: 2024 May 11 0619 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 0615 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:19 UTC

Space Weather Message Code: ALTTP4
Serial Number: 639
Issue Time: 2024 May 11 0519 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 11 0420 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

03:38 UTC

Space Weather Message Code: ALTK08
Serial Number: 35
Issue Time: 2024 May 11 0338 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0327 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

03:22 UTC

Space Weather Message Code: ALTK07
Serial Number: 147
Issue Time: 2024 May 11 0322 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0314 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

03:16 UTC

Space Weather Message Code: ALTK06
Serial Number: 560
Issue Time: 2024 May 11 0316 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 11 0308 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

03:12 UTC

Space Weather Message Code: ALTK05
Serial Number: 1580
Issue Time: 2024 May 11 0312 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 0303 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

02:46 UTC

Space Weather Message Code: ALTK09
Serial Number: 7
Issue Time: 2024 May 11 0246 UTC

ALERT: Geomagnetic K-index of 9o
Threshold Reached: 2024 May 11 0240 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G5 - Extreme

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 40 degrees Geomagnetic Latitude.
Induced Currents - Widespread voltage control problems and protective system problems may occur; some power grid systems may experience component failures or protective device trips resulting in blackouts or disruption of service. Pipeline currents can reach hundreds of amps.
Spacecraft - Systems may experience anomalies to include: extensive surface charging, unexpected orientation and attitude changes, uplink/downlink errors, and satellite orbit degradation.
Navigation - Satellite navigation (GPS) may be degraded or unavailable for days.
Radio - HF (high frequency) radio propagation may be impossible in many areas for one to two days.
Aurora - Aurora may be seen as low as Florida to southern Texas and southern California.

02:27 UTC

Space Weather Message Code: ALTPC0
Serial Number: 49
Issue Time: 2024 May 11 0227 UTC

ALERT: Proton Event 100MeV Integral Flux exceeded 1pfu
Begin Time: 2024 May 11 0210 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

02:06 UTC

Space Weather Message Code: WARPC0
Serial Number: 100
Issue Time: 2024 May 11 0206 UTC

WARNING: Proton 100MeV Integral Flux above 1pfu expected
Valid From: 2024 May 11 0205 UTC
Valid To: 2024 May 11 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact.

02:02 UTC

Space Weather Message Code: SUM10R
Serial Number: 799
Issue Time: 2024 May 11 0202 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 11 0114 UTC
Maximum Time: 2024 May 11 0124 UTC
End Time: 2024 May 11 0137 UTC
Duration: 23 minutes
Peak Flux: 800 sfu
Latest Penticton Noon Flux: 223 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

01:52 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1295
Issue Time: 2024 May 11 0152 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 11 0113 UTC
Estimated Velocity: 564 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

01:44 UTC

Space Weather Message Code: SUMX01
Serial Number: 151
Issue Time: 2024 May 11 0144 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 11 0110 UTC
Maximum Time: 2024 May 11 0123 UTC
End Time: 2024 May 11 0139 UTC
X-ray Class: X5.8
Optical Class: 2b
Location: S19W45
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

01:34 UTC

Space Weather Message Code: ALTTP4
Serial Number: 638
Issue Time: 2024 May 11 0134 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 11 0124 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

01:20 UTC

Space Weather Message Code: ALTXMF
Serial Number: 377
Issue Time: 2024 May 11 0120 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 11 0115 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

01:02 UTC

Space Weather Message Code: ALTK08
Serial Number: 34
Issue Time: 2024 May 11 0102 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 11 0053 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

00:36 UTC

Space Weather Message Code: ALTK07
Serial Number: 146
Issue Time: 2024 May 11 0036 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 11 0036 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

00:31 UTC

Space Weather Message Code: ALTK06
Serial Number: 559
Issue Time: 2024 May 11 0031 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 0020 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

00:21 UTC

Space Weather Message Code: ALTK05
Serial Number: 1579
Issue Time: 2024 May 11 0021 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 11 0020 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

vrijdag 10 mei 2024

23:57 UTC

Space Weather Message Code: WARK06
Serial Number: 520
Issue Time: 2024 May 10 2357 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 519
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 11 1800 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

23:57 UTC

Space Weather Message Code: WARK05
Serial Number: 1875
Issue Time: 2024 May 10 2357 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1874
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 11 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:57 UTC

Space Weather Message Code: WARK04
Serial Number: 4606
Issue Time: 2024 May 10 2357 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4605
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 12 0000 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

23:48 UTC

Space Weather Message Code: WARK07
Serial Number: 104
Issue Time: 2024 May 10 2348 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 103
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 11 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

23:34 UTC

Space Weather Message Code: ALTK09
Serial Number: 6
Issue Time: 2024 May 10 2334 UTC

ALERT: Geomagnetic K-index of 9o
Threshold Reached: 2024 May 10 2254 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G5 - Extreme

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 40 degrees Geomagnetic Latitude.
Induced Currents - Widespread voltage control problems and protective system problems may occur; some power grid systems may experience component failures or protective device trips resulting in blackouts or disruption of service. Pipeline currents can reach hundreds of amps.
Spacecraft - Systems may experience anomalies to include: extensive surface charging, unexpected orientation and attitude changes, uplink/downlink errors, and satellite orbit degradation.
Navigation - Satellite navigation (GPS) may be degraded or unavailable for days.
Radio - HF (high frequency) radio propagation may be impossible in many areas for one to two days.
Aurora - Aurora may be seen as low as Florida to southern Texas and southern California.

23:30 UTC

Space Weather Message Code: WARPX1
Serial Number: 556
Issue Time: 2024 May 10 2330 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 555
Valid From: 2024 May 10 1305 UTC
Now Valid Until: 2024 May 11 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

21:45 UTC

Space Weather Message Code: ALTK08
Serial Number: 33
Issue Time: 2024 May 10 2145 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 10 2139 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

21:26 UTC

Space Weather Message Code: ALTK07
Serial Number: 145
Issue Time: 2024 May 10 2126 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 10 2122 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

21:15 UTC

Space Weather Message Code: ALTK06
Serial Number: 558
Issue Time: 2024 May 10 2115 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 2110 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

21:15 UTC

Space Weather Message Code: ALTK05
Serial Number: 1578
Issue Time: 2024 May 10 2115 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 2110 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:04 UTC

Space Weather Message Code: ALTK08
Serial Number: 32
Issue Time: 2024 May 10 1904 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 10 1901 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

18:31 UTC

Space Weather Message Code: ALTK07
Serial Number: 144
Issue Time: 2024 May 10 1831 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 10 1829 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

18:22 UTC

Space Weather Message Code: ALTK06
Serial Number: 557
Issue Time: 2024 May 10 1822 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 1819 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

18:14 UTC

Space Weather Message Code: ALTK05
Serial Number: 1577
Issue Time: 2024 May 10 1814 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 1809 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:54 UTC

Space Weather Message Code: ALTPX2
Serial Number: 71
Issue Time: 2024 May 10 1754 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2024 May 10 1745 UTC
NOAA Scale: S2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures.
Spacecraft - Infrequent single-event upsets to satellites are possible.
Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies.

17:44 UTC

Space Weather Message Code: ALTK08
Serial Number: 31
Issue Time: 2024 May 10 1744 UTC

ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2024 May 10 1739 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G4 - Severe

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

17:29 UTC

Space Weather Message Code: SUMSUD
Serial Number: 269
Issue Time: 2024 May 10 1729 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2024 May 10 1645 UTC
Deviation: 108 nT
Station: Boulder

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

17:18 UTC

Space Weather Message Code: ALTK07
Serial Number: 143
Issue Time: 2024 May 10 1718 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 10 1708 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

17:17 UTC

Space Weather Message Code: ALTK06
Serial Number: 556
Issue Time: 2024 May 10 1717 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 10 1708 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

17:16 UTC

Space Weather Message Code: WARK07
Serial Number: 103
Issue Time: 2024 May 10 1716 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2024 May 10 1715 UTC
Valid To: 2024 May 10 2359 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

17:15 UTC

Space Weather Message Code: WARK06
Serial Number: 519
Issue Time: 2024 May 10 1715 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2024 May 10 1714 UTC
Valid To: 2024 May 11 0900 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

17:14 UTC

Space Weather Message Code: ALTK05
Serial Number: 1576
Issue Time: 2024 May 10 1714 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 10 1707 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:11 UTC

Space Weather Message Code: ALTK04
Serial Number: 2446
Issue Time: 2024 May 10 1711 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 May 10 1707 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:51 UTC

Space Weather Message Code: WARK05
Serial Number: 1874
Issue Time: 2024 May 10 1651 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 May 10 1700 UTC
Valid To: 2024 May 11 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:50 UTC

Space Weather Message Code: WARK04
Serial Number: 4605
Issue Time: 2024 May 10 1650 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 May 10 1700 UTC
Valid To: 2024 May 11 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:47 UTC

Space Weather Message Code: WARSUD
Serial Number: 222
Issue Time: 2024 May 10 1647 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2024 May 10 1700 UTC
Valid To: 2024 May 10 1730 UTC
IP Shock Passage Observed: 2024 May 10 1639 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

14:11 UTC

Space Weather Message Code: ALTXMF
Serial Number: 376
Issue Time: 2024 May 10 1411 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 10 1407 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

13:51 UTC

Space Weather Message Code: ALTPX1
Serial Number: 346
Issue Time: 2024 May 10 1351 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2024 May 10 1335 UTC
NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

13:03 UTC

Space Weather Message Code: WARPX1
Serial Number: 555
Issue Time: 2024 May 10 1303 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2024 May 10 1305 UTC
Valid To: 2024 May 10 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

07:40 UTC

Space Weather Message Code: SUMX01
Serial Number: 150
Issue Time: 2024 May 10 0740 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 10 0627 UTC
Maximum Time: 2024 May 10 0654 UTC
End Time: 2024 May 10 0706 UTC
X-ray Class: X3.9
Optical Class: 3b
Location: S15W36
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

07:31 UTC

Space Weather Message Code: ALTTP4
Serial Number: 637
Issue Time: 2024 May 10 0731 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 10 0651 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

07:30 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1294
Issue Time: 2024 May 10 0730 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 10 0646 UTC
Estimated Velocity: 1248 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

07:16 UTC

Space Weather Message Code: SUM10R
Serial Number: 798
Issue Time: 2024 May 10 0716 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 10 0638 UTC
Maximum Time: 2024 May 10 0643 UTC
End Time: 2024 May 10 0654 UTC
Duration: 16 minutes
Peak Flux: 900 sfu
Latest Penticton Noon Flux: 233 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

06:44 UTC

Space Weather Message Code: ALTXMF
Serial Number: 375
Issue Time: 2024 May 10 0644 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 10 0641 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

donderdag 9 mei 2024

18:10 UTC

Space Weather Message Code: SUM10R
Serial Number: 797
Issue Time: 2024 May 09 1810 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 09 1731 UTC
Maximum Time: 2024 May 09 1745 UTC
End Time: 2024 May 09 1752 UTC
Duration: 21 minutes
Peak Flux: 300 sfu
Latest Penticton Noon Flux: 227 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

18:09 UTC

Space Weather Message Code: SUMX01
Serial Number: 149
Issue Time: 2024 May 09 1809 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 09 1723 UTC
Maximum Time: 2024 May 09 1744 UTC
End Time: 2024 May 09 1800 UTC
X-ray Class: X1.1
Location: S19W30
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

18:01 UTC

Space Weather Message Code: ALTTP4
Serial Number: 636
Issue Time: 2024 May 09 1801 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 09 1745 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

17:44 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1293
Issue Time: 2024 May 09 1744 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 09 1732 UTC
Estimated Velocity: 303 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

17:35 UTC

Space Weather Message Code: ALTXMF
Serial Number: 374
Issue Time: 2024 May 09 1734 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 09 1733 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

17:22 UTC

Space Weather Message Code: WATA99
Serial Number: 6
Issue Time: 2024 May 09 1722 UTC

WATCH: Geomagnetic Storm Category G4 or Greater Predicted

Highest Storm Level Predicted by Day:
May 10: G1 (Minor) May 11: G4 (Severe) May 12: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude.
Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.
Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.
Navigation - Satellite navigation (GPS) degraded or inoperable for hours.
Radio - HF (high frequency) radio propagation sporadic or blacked out.
Aurora - Aurora may be seen as low as Alabama and northern California.

12:51 UTC

Space Weather Message Code: SUM10R
Serial Number: 796
Issue Time: 2024 May 09 1251 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 09 0852 UTC
Maximum Time: 2024 May 09 0939 UTC
End Time: 2024 May 09 0942 UTC
Duration: 50 minutes
Peak Flux: 3600 sfu
Latest Penticton Noon Flux: 227 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

09:52 UTC

Space Weather Message Code: SUMX01
Serial Number: 148
Issue Time: 2024 May 09 0952 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 09 0845 UTC
Maximum Time: 2024 May 09 0913 UTC
End Time: 2024 May 09 0936 UTC
X-ray Class: X2.2
Optical Class: 3b
Location: S20W26
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

09:36 UTC

Space Weather Message Code: ALTTP4
Serial Number: 635
Issue Time: 2024 May 09 0936 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 09 0910 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

09:34 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1292
Issue Time: 2024 May 09 0934 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 09 0902 UTC
Estimated Velocity: 1004 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

08:55 UTC

Space Weather Message Code: ALTXMF
Serial Number: 373
Issue Time: 2024 May 09 0855 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 09 0853 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

08:34 UTC

Space Weather Message Code: WATA50
Serial Number: 75
Issue Time: 2024 May 09 0834 UTC

WATCH: Geomagnetic Storm Category G3 Predicted

Highest Storm Level Predicted by Day:
May 09: None (Below G1) May 10: G1 (Minor) May 11: G3 (Strong)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

00:20 UTC

Space Weather Message Code: SUM10R
Serial Number: 795
Issue Time: 2024 May 09 0020 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 08 2134 UTC
Maximum Time: 2024 May 08 2209 UTC
End Time: 2024 May 08 2309 UTC
Duration: 175 minutes
Peak Flux: 1000 sfu
Latest Penticton Noon Flux: 227 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

woensdag 8 mei 2024

23:37 UTC

Space Weather Message Code: SUMX01
Serial Number: 147
Issue Time: 2024 May 08 2337 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 08 2108 UTC
Maximum Time: 2024 May 08 2140 UTC
End Time: 2024 May 08 2310 UTC
X-ray Class: X1.0
Location: S21W18
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

21:29 UTC

Space Weather Message Code: ALTXMF
Serial Number: 372
Issue Time: 2024 May 08 2129 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 2128 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

18:14 UTC

Space Weather Message Code: SUMXM5
Serial Number: 224
Issue Time: 2024 May 08 1814 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 08 1732 UTC
Maximum Time: 2024 May 08 1753 UTC
End Time: 2024 May 08 1800 UTC
X-ray Class: M7.9
Optical Class: sf
Location: S18W13
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

17:50 UTC

Space Weather Message Code: ALTXMF
Serial Number: 371
Issue Time: 2024 May 08 1750 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 1743 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

16:03 UTC

Space Weather Message Code: WATA30
Serial Number: 231
Issue Time: 2024 May 08 1603 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
May 09: None (Below G1) May 10: G1 (Minor) May 11: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

12:36 UTC

Space Weather Message Code: SUMXM5
Serial Number: 223
Issue Time: 2024 May 08 1236 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 08 1126 UTC
Maximum Time: 2024 May 08 1204 UTC
End Time: 2024 May 08 1217 UTC
X-ray Class: M8.6
Location: S35W01
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

11:49 UTC

Space Weather Message Code: ALTXMF
Serial Number: 370
Issue Time: 2024 May 08 1149 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 1147 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

07:09 UTC

Space Weather Message Code: SUMXM5
Serial Number: 222
Issue Time: 2024 May 08 0709 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 08 0644 UTC
Maximum Time: 2024 May 08 0653 UTC
End Time: 2024 May 08 0703 UTC
X-ray Class: M7.1
Optical Class: sf
Location: S20W12
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

06:52 UTC

Space Weather Message Code: ALTXMF
Serial Number: 369
Issue Time: 2024 May 08 0652 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 0650 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

06:48 UTC

Space Weather Message Code: SUM10R
Serial Number: 794
Issue Time: 2024 May 08 0648 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 08 0454 UTC
Maximum Time: 2024 May 08 0459 UTC
End Time: 2024 May 08 0516 UTC
Duration: 22 minutes
Peak Flux: 570 sfu
Latest Penticton Noon Flux: 204 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

05:39 UTC

Space Weather Message Code: SUMX01
Serial Number: 146
Issue Time: 2024 May 08 0539 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 08 0437 UTC
Maximum Time: 2024 May 08 0509 UTC
End Time: 2024 May 08 0532 UTC
X-ray Class: X1.0
Optical Class: 2b
Location: S21W11
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

05:29 UTC

Space Weather Message Code: ALTTP4
Serial Number: 634
Issue Time: 2024 May 08 0529 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 08 0508 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

05:24 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1291
Issue Time: 2024 May 08 0524 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 08 0501 UTC
Estimated Velocity: 1152 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

04:51 UTC

Space Weather Message Code: ALTXMF
Serial Number: 368
Issue Time: 2024 May 08 0451 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 0449 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

01:54 UTC

Space Weather Message Code: SUMX01
Serial Number: 145
Issue Time: 2024 May 08 0154 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 08 0133 UTC
Maximum Time: 2024 May 08 0141 UTC
End Time: 2024 May 08 0148 UTC
X-ray Class: X1
Optical Class: 1b
Location: N24W58
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

01:41 UTC

Space Weather Message Code: ALTXMF
Serial Number: 367
Issue Time: 2024 May 08 0141 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 08 0140 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

dinsdag 7 mei 2024

16:42 UTC

Space Weather Message Code: SUMXM5
Serial Number: 221
Issue Time: 2024 May 07 1642 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 07 1621 UTC
Maximum Time: 2024 May 07 1630 UTC
End Time: 2024 May 07 1636 UTC
X-ray Class: M8.2
Location: N22W51
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

16:33 UTC

Space Weather Message Code: ALTXMF
Serial Number: 366
Issue Time: 2024 May 07 1633 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 07 1630 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

06:55 UTC

Space Weather Message Code: SUMXM5
Serial Number: 220
Issue Time: 2024 May 07 0655 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 07 0558 UTC
Maximum Time: 2024 May 07 0615 UTC
End Time: 2024 May 07 0627 UTC
X-ray Class: M5.1
Optical Class: na
Location: N27W44
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

06:18 UTC

Space Weather Message Code: ALTXMF
Serial Number: 365
Issue Time: 2024 May 07 0618 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 07 0615 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

maandag 6 mei 2024

09:00 UTC

Space Weather Message Code: WARK04
Serial Number: 4604
Issue Time: 2024 May 06 0900 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4603
Valid From: 2024 May 05 1930 UTC
Now Valid Until: 2024 May 06 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:55 UTC

Space Weather Message Code: WARK05
Serial Number: 1873
Issue Time: 2024 May 06 0855 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1872
Valid From: 2024 May 05 2335 UTC
Now Valid Until: 2024 May 06 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

07:01 UTC

Space Weather Message Code: SUMX01
Serial Number: 144
Issue Time: 2024 May 06 0701 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 06 0538 UTC
Maximum Time: 2024 May 06 0635 UTC
End Time: 2024 May 06 0647 UTC
X-ray Class: X4.5
Optical Class: 3b
Location: N23W34
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

06:10 UTC

Space Weather Message Code: ALTXMF
Serial Number: 364
Issue Time: 2024 May 06 0610 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 06 0608 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

01:18 UTC

Space Weather Message Code: ALTK05
Serial Number: 1575
Issue Time: 2024 May 06 0118 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 06 0117 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

01:18 UTC

Space Weather Message Code: WARK06
Serial Number: 518
Issue Time: 2024 May 06 0118 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2024 May 06 0118 UTC
Valid To: 2024 May 06 0900 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

zondag 5 mei 2024

23:36 UTC

Space Weather Message Code: WARK05
Serial Number: 1872
Issue Time: 2024 May 05 2336 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 May 05 2335 UTC
Valid To: 2024 May 06 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:33 UTC

Space Weather Message Code: ALTK04
Serial Number: 2445
Issue Time: 2024 May 05 2333 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 May 05 2333 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

19:32 UTC

Space Weather Message Code: WARK04
Serial Number: 4603
Issue Time: 2024 May 05 1932 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 May 05 1930 UTC
Valid To: 2024 May 06 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

12:32 UTC

Space Weather Message Code: SUMX01
Serial Number: 143
Issue Time: 2024 May 05 1232 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 05 1141 UTC
Maximum Time: 2024 May 05 1154 UTC
End Time: 2024 May 05 1243 UTC
X-ray Class: X1.2
Optical Class: sn
Location: N24W24
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

11:52 UTC

Space Weather Message Code: ALTXMF
Serial Number: 363
Issue Time: 2024 May 05 1152 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 1150 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

10:38 UTC

Space Weather Message Code: SUMXM5
Serial Number: 219
Issue Time: 2024 May 05 1038 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 05 0953 UTC
Maximum Time: 2024 May 05 1000 UTC
End Time: 2024 May 05 1019 UTC
X-ray Class: M7.4
Location: N26W24
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

09:59 UTC

Space Weather Message Code: ALTXMF
Serial Number: 362
Issue Time: 2024 May 05 0959 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 0957 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

06:20 UTC

Space Weather Message Code: SUMX01
Serial Number: 142
Issue Time: 2024 May 05 0620 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 05 0547 UTC
Maximum Time: 2024 May 05 0601 UTC
End Time: 2024 May 05 0607 UTC
X-ray Class: X1.3
Optical Class: 1b
Location: N23W21
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

06:01 UTC

Space Weather Message Code: ALTXMF
Serial Number: 361
Issue Time: 2024 May 05 0601 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 0558 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

03:20 UTC

Space Weather Message Code: SUM10R
Serial Number: 793
Issue Time: 2024 May 05 0320 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 05 0259 UTC
Maximum Time: 2024 May 05 0300 UTC
End Time: 2024 May 05 0301 UTC
Duration: 3 minutes
Peak Flux: 280 sfu
Latest Penticton Noon Flux: 167 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

01:53 UTC

Space Weather Message Code: SUMXM5
Serial Number: 218
Issue Time: 2024 May 05 0153 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 05 0115 UTC
Maximum Time: 2024 May 05 0127 UTC
End Time: 2024 May 05 0143 UTC
X-ray Class: M8.4
Optical Class: 1b
Location: N25W19
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

01:25 UTC

Space Weather Message Code: ALTXMF
Serial Number: 360
Issue Time: 2024 May 05 0125 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 05 0123 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

00:11 UTC

Space Weather Message Code: SUMXM5
Serial Number: 217
Issue Time: 2024 May 05 0011 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 04 2328 UTC
Maximum Time: 2024 May 04 2348 UTC
End Time: 2024 May 04 2355 UTC
X-ray Class: M9.0
Optical Class: 1b
Location: N26W10
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

zaterdag 4 mei 2024

23:42 UTC

Space Weather Message Code: ALTXMF
Serial Number: 359
Issue Time: 2024 May 04 2342 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 04 2339 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

06:56 UTC

Space Weather Message Code: ALTTP4
Serial Number: 633
Issue Time: 2024 May 04 0656 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 04 0638 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

06:55 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1290
Issue Time: 2024 May 04 0655 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 04 0625 UTC
Estimated Velocity: 950 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

06:42 UTC

Space Weather Message Code: SUMXM5
Serial Number: 216
Issue Time: 2024 May 04 0642 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 May 04 0602 UTC
Maximum Time: 2024 May 04 0619 UTC
End Time: 2024 May 04 0630 UTC
X-ray Class: M9.1
Optical Class: 1b
Location: N26W07
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

06:38 UTC

Space Weather Message Code: SUM10R
Serial Number: 792
Issue Time: 2024 May 04 0638 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 04 0613 UTC
Maximum Time: 2024 May 04 0614 UTC
End Time: 2024 May 04 0616 UTC
Duration: 3 minutes
Peak Flux: 280 sfu
Latest Penticton Noon Flux: 156 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

06:18 UTC

Space Weather Message Code: ALTXMF
Serial Number: 358
Issue Time: 2024 May 04 0618 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 04 0616 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

vrijdag 3 mei 2024

23:59 UTC

Space Weather Message Code: ALTTP4
Serial Number: 632
Issue Time: 2024 May 03 2359 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 03 2035 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

21:02 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1289
Issue Time: 2024 May 03 2102 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 03 2023 UTC
Estimated Velocity: 453 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

20:59 UTC

Space Weather Message Code: WATA30
Serial Number: 230
Issue Time: 2024 May 03 2059 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
May 04: None (Below G1) May 05: G1 (Minor) May 06: G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

02:51 UTC

Space Weather Message Code: ALTTP4
Serial Number: 631
Issue Time: 2024 May 03 0251 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 May 03 0232 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

02:39 UTC

Space Weather Message Code: SUM10R
Serial Number: 791
Issue Time: 2024 May 03 0239 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 May 03 0219 UTC
Maximum Time: 2024 May 03 0219 UTC
End Time: 2024 May 03 0223 UTC
Duration: 4 minutes
Peak Flux: 660 sfu
Latest Penticton Noon Flux: 142 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

02:38 UTC

Space Weather Message Code: SUMX01
Serial Number: 141
Issue Time: 2024 May 03 0238 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2024 May 03 0211 UTC
Maximum Time: 2024 May 03 0222 UTC
End Time: 2024 May 03 0227 UTC
X-ray Class: X1.6
Optical Class: 1b
Location: N23E06
NOAA Scale: R3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

02:36 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1288
Issue Time: 2024 May 03 0236 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 May 03 0220 UTC
Estimated Velocity: 959 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

02:22 UTC

Space Weather Message Code: ALTXMF
Serial Number: 357
Issue Time: 2024 May 03 0222 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 03 0219 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

donderdag 2 mei 2024

21:00 UTC

Space Weather Message Code: ALTK07
Serial Number: 142
Issue Time: 2024 May 02 2100 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 02 2059 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

20:56 UTC

Space Weather Message Code: WARK04
Serial Number: 4602
Issue Time: 2024 May 02 2056 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4601
Valid From: 2024 May 02 1335 UTC
Now Valid Until: 2024 May 03 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:56 UTC

Space Weather Message Code: WARK06
Serial Number: 517
Issue Time: 2024 May 02 2056 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 516
Valid From: 2024 May 02 1450 UTC
Now Valid Until: 2024 May 03 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:56 UTC

Space Weather Message Code: WARK05
Serial Number: 1871
Issue Time: 2024 May 02 2056 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1870
Valid From: 2024 May 02 1355 UTC
Now Valid Until: 2024 May 03 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:56 UTC

Space Weather Message Code: WARK07
Serial Number: 102
Issue Time: 2024 May 02 2056 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 101
Valid From: 2024 May 02 1640 UTC
Now Valid Until: 2024 May 03 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

19:17 UTC

Space Weather Message Code: ALTK06
Serial Number: 555
Issue Time: 2024 May 02 1917 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 02 1917 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

19:04 UTC

Space Weather Message Code: ALTK05
Serial Number: 1574
Issue Time: 2024 May 02 1904 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 02 1904 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

18:03 UTC

Space Weather Message Code: ALTK07
Serial Number: 141
Issue Time: 2024 May 02 1803 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2024 May 02 1759 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G3 - Strong

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

16:39 UTC

Space Weather Message Code: WARK07
Serial Number: 101
Issue Time: 2024 May 02 1639 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2024 May 02 1640 UTC
Valid To: 2024 May 02 2100 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

16:24 UTC

Space Weather Message Code: ALTK06
Serial Number: 554
Issue Time: 2024 May 02 1624 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2024 May 02 1624 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

16:05 UTC

Space Weather Message Code: ALTK05
Serial Number: 1573
Issue Time: 2024 May 02 1605 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 02 1605 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:50 UTC

Space Weather Message Code: ALTK05
Serial Number: 1572
Issue Time: 2024 May 02 1450 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 May 02 1448 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:50 UTC

Space Weather Message Code: WARK06
Serial Number: 516
Issue Time: 2024 May 02 1450 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2024 May 02 1450 UTC
Valid To: 2024 May 02 2100 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

14:22 UTC

Space Weather Message Code: ALTK04
Serial Number: 2444
Issue Time: 2024 May 02 1422 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 May 02 1422 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:22 UTC

Space Weather Message Code: SUMSUD
Serial Number: 268
Issue Time: 2024 May 02 1422 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2024 May 02 1412 UTC
Deviation: 29 nT
Station: HAD

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

13:51 UTC

Space Weather Message Code: WARK05
Serial Number: 1870
Issue Time: 2024 May 02 1351 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 May 02 1355 UTC
Valid To: 2024 May 02 2100 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

13:32 UTC

Space Weather Message Code: WARK04
Serial Number: 4601
Issue Time: 2024 May 02 1332 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 May 02 1335 UTC
Valid To: 2024 May 03 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

13:29 UTC

Space Weather Message Code: WARSUD
Serial Number: 221
Issue Time: 2024 May 02 1329 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2024 May 02 1404 UTC
Valid To: 2024 May 02 1434 UTC
IP Shock Passage Observed: 2024 May 02 1317 UTC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

woensdag 1 mei 2024

02:26 UTC

Space Weather Message Code: WARK04
Serial Number: 4600
Issue Time: 2024 May 01 0226 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4599
Valid From: 2024 Apr 30 2242 UTC
Now Valid Until: 2024 May 01 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

00:04 UTC

Space Weather Message Code: SUMXM5
Serial Number: 215
Issue Time: 2024 May 01 0004 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2024 Apr 30 2323 UTC
Maximum Time: 2024 Apr 30 2346 UTC
End Time: 2024 Apr 30 2358 UTC
X-ray Class: M9.5
Optical Class: 2b
Location: S07W63
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

dinsdag 30 april 2024

23:55 UTC

Space Weather Message Code: SUM10R
Serial Number: 790
Issue Time: 2024 Apr 30 2355 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 Apr 30 2342 UTC
Maximum Time: 2024 Apr 30 2343 UTC
End Time: 2024 Apr 30 2345 UTC
Duration: 3 minutes
Peak Flux: 270 sfu
Latest Penticton Noon Flux: 130 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

23:49 UTC

Space Weather Message Code: ALTXMF
Serial Number: 356
Issue Time: 2024 Apr 30 2349 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 Apr 30 2343 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

23:33 UTC

Space Weather Message Code: WARK05
Serial Number: 1869
Issue Time: 2024 Apr 30 2333 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 Apr 30 2332 UTC
Valid To: 2024 May 01 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:16 UTC

Space Weather Message Code: ALTK04
Serial Number: 2443
Issue Time: 2024 Apr 30 2316 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 Apr 30 2315 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes

Comment: Conditions were likely first reached at approximately 30/1955 UTC. However, a major network outage prevented alert issuance.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

22:43 UTC

Space Weather Message Code: WARK04
Serial Number: 4599
Issue Time: 2024 Apr 30 2243 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 30 2242 UTC
Valid To: 2024 May 01 0300 UTC
Warning Condition: Persistence

Comment: Conditions were likely first reached at approximately 30/1642 UTC. However, a major network outage prevented warning issuance.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:42 UTC

Space Weather Message Code: WARK04
Serial Number: 4598
Issue Time: 2024 Apr 30 1642 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 30 1642 UTC
Valid To: 2024 Apr 30 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

zondag 28 april 2024

02:32 UTC

Space Weather Message Code: ALTK04
Serial Number: 2442
Issue Time: 2024 Apr 28 0232 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 Apr 28 0230 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

zaterdag 27 april 2024

14:16 UTC

Space Weather Message Code: WARK04
Serial Number: 4597
Issue Time: 2024 Apr 27 1416 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 27 1415 UTC
Valid To: 2024 Apr 28 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

vrijdag 26 april 2024

23:00 UTC

Space Weather Message Code: WARK04
Serial Number: 4596
Issue Time: 2024 Apr 26 2300 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4595
Valid From: 2024 Apr 26 0500 UTC
Now Valid Until: 2024 Apr 27 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:51 UTC

Space Weather Message Code: ALTK05
Serial Number: 1571
Issue Time: 2024 Apr 26 1651 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2024 Apr 26 1649 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:48 UTC

Space Weather Message Code: WARK05
Serial Number: 1868
Issue Time: 2024 Apr 26 1648 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 Apr 26 1646 UTC
Valid To: 2024 Apr 26 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:59 UTC

Space Weather Message Code: ALTK04
Serial Number: 2441
Issue Time: 2024 Apr 26 1459 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2024 Apr 26 1456 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:06 UTC

Space Weather Message Code: WARK04
Serial Number: 4595
Issue Time: 2024 Apr 26 1406 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4594
Valid From: 2024 Apr 26 0500 UTC
Now Valid Until: 2024 Apr 26 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

04:51 UTC

Space Weather Message Code: WARK04
Serial Number: 4594
Issue Time: 2024 Apr 26 0451 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2024 Apr 26 0500 UTC
Valid To: 2024 Apr 26 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

donderdag 25 april 2024

10:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3395
Issue Time: 2024 Apr 25 1059 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2024 Apr 25 1045 UTC
Station: GOES16




Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

woensdag 24 april 2024

15:00 UTC

Space Weather Message Code: ALTTP4
Serial Number: 630
Issue Time: 2024 Apr 24 1500 UTC

ALERT: Type IV Radio Emission
Begin Time: 2024 Apr 24 1440 UTC



Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

14:32 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1287
Issue Time: 2024 Apr 24 1432 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 Apr 24 1415 UTC
Estimated Velocity: 800 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

dinsdag 23 april 2024

19:16 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1286
Issue Time: 2024 Apr 23 1916 UTC

ALERT: Type II Radio Emission
Begin Time: 2024 Apr 23 1710 UTC
Estimated Velocity: 358 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

03:57 UTC

Space Weather Message Code: SUM10R
Serial Number: 789
Issue Time: 2024 Apr 23 0357 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2024 Apr 23 0313 UTC
Maximum Time: 2024 Apr 23 0314 UTC
End Time: 2024 Apr 23 0315 UTC
Duration: 2 minutes
Peak Flux: 290 sfu
Latest Penticton Noon Flux: 227 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

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