Avvisi e Osservazioni del SWPC della NOAA
Il Centro di Predizione Meteorologico Spaziale dell'Amministrazione Atmosferica e Oceanica Nazionale (SWPC della NOAA) è l'agenzia governativa meteorologica spaziale ufficiale degli Stati Uniti che fornisce allerte e avvisi per i disturbi meteorologici spaziali. Sotto troverete le ultime allerte e avvisi meteorologici spaziali emessi dal SWPC della NOAA.
lunedì, 16 febbraio AM
05:57 UTC
Space Weather Message Code: WARK04
Serial Number: 5259
Issue Time: 2026 Feb 16 0557 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5258
Valid From: 2026 Feb 14 2000 UTC
Now Valid Until: 2026 Feb 16 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.
05:56 UTC
Space Weather Message Code: WARK05
Serial Number: 2193
Issue Time: 2026 Feb 16 0556 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2192
Valid From: 2026 Feb 16 0140 UTC
Now Valid Until: 2026 Feb 16 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.
01:42 UTC
Space Weather Message Code: WARK05
Serial Number: 2192
Issue Time: 2026 Feb 16 0142 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Feb 16 0140 UTC
Valid To: 2026 Feb 16 0600 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.
domenica, 15 febbraio PM
23:38 UTC
Space Weather Message Code: WARK04
Serial Number: 5258
Issue Time: 2026 Feb 15 2338 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5257
Valid From: 2026 Feb 14 2000 UTC
Now Valid Until: 2026 Feb 16 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.
05:14 UTC
Space Weather Message Code: WARK06
Serial Number: 639
Issue Time: 2026 Feb 15 0514 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Feb 15 0515 UTC
Valid To: 2026 Feb 15 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.
05:14 UTC
Space Weather Message Code: WARK04
Serial Number: 5257
Issue Time: 2026 Feb 15 0514 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5256
Valid From: 2026 Feb 14 2000 UTC
Now Valid Until: 2026 Feb 15 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.
05:14 UTC
Space Weather Message Code: WARK05
Serial Number: 2191
Issue Time: 2026 Feb 15 0514 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2190
Valid From: 2026 Feb 14 2135 UTC
Now Valid Until: 2026 Feb 15 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.
04:35 UTC
Space Weather Message Code: ALTK05
Serial Number: 1965
Issue Time: 2026 Feb 15 0435 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Feb 15 0429 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.
02:13 UTC
Space Weather Message Code: ALTK05
Serial Number: 1964
Issue Time: 2026 Feb 15 0213 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Feb 15 0204 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.
sabato, 14 febbraio PM
21:35 UTC
Space Weather Message Code: WARK05
Serial Number: 2190
Issue Time: 2026 Feb 14 2135 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Feb 14 2135 UTC
Valid To: 2026 Feb 15 0600 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.
21:35 UTC
Space Weather Message Code: WARK04
Serial Number: 5256
Issue Time: 2026 Feb 14 2135 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5255
Valid From: 2026 Feb 14 2000 UTC
Now Valid Until: 2026 Feb 15 0900 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.
21:33 UTC
Space Weather Message Code: ALTK04
Serial Number: 2632
Issue Time: 2026 Feb 14 2133 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Feb 14 2133 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.
19:59 UTC
Space Weather Message Code: WARK04
Serial Number: 5255
Issue Time: 2026 Feb 14 1959 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Feb 14 2000 UTC
Valid To: 2026 Feb 15 0300 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.
venerdì, 13 febbraio PM
18:22 UTC
Space Weather Message Code: WATA20
Serial Number: 1096
Issue Time: 2026 Feb 13 1822 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 14: None (Below G1) Feb 15: G1 (Minor) Feb 16: 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 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.
17:07 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3626
Issue Time: 2026 Feb 13 1707 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Feb 13 1650 UTC
Station: GOES19
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
16:29 UTC
Space Weather Message Code: WARK04
Serial Number: 5254
Issue Time: 2026 Feb 13 1629 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5253
Valid From: 2026 Feb 13 0210 UTC
Now Valid Until: 2026 Feb 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.
02:13 UTC
Space Weather Message Code: ALTK04
Serial Number: 2631
Issue Time: 2026 Feb 13 0213 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Feb 13 0213 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.
02:11 UTC
Space Weather Message Code: WARK04
Serial Number: 5253
Issue Time: 2026 Feb 13 0211 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Feb 13 0210 UTC
Valid To: 2026 Feb 13 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 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.
giovedì, 12 febbraio PM
15:27 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3625
Issue Time: 2026 Feb 12 1527 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Feb 12 1510 UTC
Station: GOES19
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
14:55 UTC
Space Weather Message Code: WATA20
Serial Number: 1095
Issue Time: 2026 Feb 12 1455 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 13: None (Below G1) Feb 14: None (Below G1) Feb 15: 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 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.
mercoledì, 11 febbraio PM
22:21 UTC
Space Weather Message Code: ALTK04
Serial Number: 2630
Issue Time: 2026 Feb 11 2221 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Feb 11 2221 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.
19:37 UTC
Space Weather Message Code: WARK04
Serial Number: 5252
Issue Time: 2026 Feb 11 1937 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Feb 11 1936 UTC
Valid To: 2026 Feb 12 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.
martedì, 10 febbraio PM
23:30 UTC
Space Weather Message Code: WARK05
Serial Number: 2189
Issue Time: 2026 Feb 10 2330 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Feb 10 2330 UTC
Valid To: 2026 Feb 11 0600 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.
22:15 UTC
Space Weather Message Code: ALTK04
Serial Number: 2629
Issue Time: 2026 Feb 10 2215 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Feb 10 2214 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.
22:14 UTC
Space Weather Message Code: WARK04
Serial Number: 5251
Issue Time: 2026 Feb 10 2214 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Feb 10 2213 UTC
Valid To: 2026 Feb 11 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.
12:12 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3624
Issue Time: 2026 Feb 10 1212 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3623
Begin Time: 2026 Feb 07 1340 UTC
Yesterday Maximum 2MeV Flux: 1764 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
lunedì, 9 febbraio PM
12:11 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3623
Issue Time: 2026 Feb 09 1211 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3622
Begin Time: 2026 Feb 07 1340 UTC
Yesterday Maximum 2MeV Flux: 1894 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
domenica, 8 febbraio PM
14:02 UTC
Space Weather Message Code: SUM10R
Serial Number: 900
Issue Time: 2026 Feb 08 1402 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2026 Feb 08 1350 UTC
Maximum Time: 2026 Feb 08 1350 UTC
End Time: 2026 Feb 08 1353 UTC
Duration: 3 minutes
Peak Flux: 440 sfu
Latest Penticton Noon Flux: 169 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.
11:57 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3622
Issue Time: 2026 Feb 08 1157 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3621
Begin Time: 2026 Feb 07 1340 UTC
Yesterday Maximum 2MeV Flux: 2062 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
sabato, 7 febbraio PM
21:25 UTC
Space Weather Message Code: WARK04
Serial Number: 5250
Issue Time: 2026 Feb 07 2125 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5249
Valid From: 2026 Feb 06 1253 UTC
Now Valid Until: 2026 Feb 08 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.
14:18 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3621
Issue Time: 2026 Feb 07 1418 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Feb 07 1340 UTC
Station: GOES18
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
08:48 UTC
Space Weather Message Code: WARK04
Serial Number: 5249
Issue Time: 2026 Feb 07 0848 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5248
Valid From: 2026 Feb 06 1253 UTC
Now Valid Until: 2026 Feb 07 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.
venerdì, 6 febbraio PM
23:51 UTC
Space Weather Message Code: WARK04
Serial Number: 5248
Issue Time: 2026 Feb 06 2351 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5247
Valid From: 2026 Feb 06 1253 UTC
Now Valid Until: 2026 Feb 07 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.
17:44 UTC
Space Weather Message Code: WARK05
Serial Number: 2188
Issue Time: 2026 Feb 06 1744 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Feb 06 1744 UTC
Valid To: 2026 Feb 06 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.
15:01 UTC
Space Weather Message Code: ALTK04
Serial Number: 2628
Issue Time: 2026 Feb 06 1501 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Feb 06 1459 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.
12:54 UTC
Space Weather Message Code: WARK04
Serial Number: 5247
Issue Time: 2026 Feb 06 1254 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Feb 06 1253 UTC
Valid To: 2026 Feb 06 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.
giovedì, 5 febbraio PM
15:51 UTC
Space Weather Message Code: WATA20
Serial Number: 1094
Issue Time: 2026 Feb 05 1551 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 06: G1 (Minor) Feb 07: None (Below G1) Feb 08: 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 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.
08:54 UTC
Space Weather Message Code: WARK04
Serial Number: 5246
Issue Time: 2026 Feb 05 0854 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5245
Valid From: 2026 Feb 04 1515 UTC
Now Valid Until: 2026 Feb 05 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.
08:54 UTC
Space Weather Message Code: WARK05
Serial Number: 2187
Issue Time: 2026 Feb 05 0854 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2186
Valid From: 2026 Feb 05 0300 UTC
Now Valid Until: 2026 Feb 05 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.
04:33 UTC
Space Weather Message Code: ALTK05
Serial Number: 1963
Issue Time: 2026 Feb 05 0433 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Feb 05 0426 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: WARK05
Serial Number: 2186
Issue Time: 2026 Feb 05 0259 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Feb 05 0300 UTC
Valid To: 2026 Feb 05 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.
mercoledì, 4 febbraio PM
23:12 UTC
Space Weather Message Code: WARK04
Serial Number: 5245
Issue Time: 2026 Feb 04 2312 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5244
Valid From: 2026 Feb 04 1515 UTC
Now Valid Until: 2026 Feb 05 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.
17:00 UTC
Space Weather Message Code: ALTK04
Serial Number: 2627
Issue Time: 2026 Feb 04 1700 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Feb 03 1700 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.
15:35 UTC
Space Weather Message Code: SUMSUD
Serial Number: 295
Issue Time: 2026 Feb 04 1535 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Feb 04 1506 UTC
Deviation: 16 nT
Station: BOU
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
15:08 UTC
Space Weather Message Code: WARK04
Serial Number: 5244
Issue Time: 2026 Feb 04 1508 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Feb 04 1515 UTC
Valid To: 2026 Feb 04 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.
14:33 UTC
Space Weather Message Code: WARSUD
Serial Number: 250
Issue Time: 2026 Feb 04 1433 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Feb 04 1505 UTC
Valid To: 2026 Feb 04 1535 UTC
IP Shock Passage Observed: 2026 Feb 04 1421 UTC
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
12:39 UTC
Space Weather Message Code: SUMX01
Serial Number: 211
Issue Time: 2026 Feb 04 1239 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Feb 04 1202 UTC
Maximum Time: 2026 Feb 04 1213 UTC
End Time: 2026 Feb 04 1218 UTC
X-ray Class: X4.2
Optical Class: na
Location: N14E04
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.
12:12 UTC
Space Weather Message Code: ALTXMF
Serial Number: 520
Issue Time: 2026 Feb 04 1212 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 04 1209 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.
09:27 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3620
Issue Time: 2026 Feb 04 0927 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3619
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 10480 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
martedì, 3 febbraio PM
16:46 UTC
Space Weather Message Code: WATA20
Serial Number: 1093
Issue Time: 2026 Feb 03 1646 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 04: None (Below G1) Feb 05: G1 (Minor) Feb 06: 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 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.
15:10 UTC
Space Weather Message Code: SUMXM5
Serial Number: 310
Issue Time: 2026 Feb 03 1510 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 03 1445 UTC
Maximum Time: 2026 Feb 03 1456 UTC
End Time: 2026 Feb 03 1503 UTC
X-ray Class: M7.2
Location: N14E14
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.
14:58 UTC
Space Weather Message Code: ALTXMF
Serial Number: 519
Issue Time: 2026 Feb 03 1458 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 03 1455 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.
14:28 UTC
Space Weather Message Code: SUMX01
Serial Number: 210
Issue Time: 2026 Feb 03 1428 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Feb 03 1358 UTC
Maximum Time: 2026 Feb 03 1408 UTC
End Time: 2026 Feb 03 1418 UTC
X-ray Class: X1.5
Location: N14E14
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.
14:11 UTC
Space Weather Message Code: ALTXMF
Serial Number: 518
Issue Time: 2026 Feb 03 1411 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 03 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.
07:25 UTC
Space Weather Message Code: SUMXM5
Serial Number: 309
Issue Time: 2026 Feb 03 0725 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 03 0643 UTC
Maximum Time: 2026 Feb 03 0701 UTC
End Time: 2026 Feb 03 0719 UTC
X-ray Class: M7.2
Location: N14E17
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.
07:02 UTC
Space Weather Message Code: ALTXMF
Serial Number: 517
Issue Time: 2026 Feb 03 0702 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 03 0700 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.
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3619
Issue Time: 2026 Feb 03 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3618
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 7292 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
lunedì, 2 febbraio AM
11:43 UTC
Space Weather Message Code: SUMXM5
Serial Number: 308
Issue Time: 2026 Feb 02 1143 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 02 1115 UTC
Maximum Time: 2026 Feb 02 1124 UTC
End Time: 2026 Feb 02 1131 UTC
X-ray Class: M6.7
Location: N18E30
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.
11:23 UTC
Space Weather Message Code: ALTXMF
Serial Number: 516
Issue Time: 2026 Feb 02 1123 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 02 1121 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.
10:31 UTC
Space Weather Message Code: WATA20
Serial Number: 1092
Issue Time: 2026 Feb 02 1031 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 03: None (Below G1) Feb 04: None (Below G1) Feb 05: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: CME(s) associated with a complex eruption during the X8.1 event from Region 4366 will likely deliver glancing influences by late on 05 Feb leading to possible minor geomagnetic storming conditions.
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.
08:49 UTC
Space Weather Message Code: SUMX01
Serial Number: 209
Issue Time: 2026 Feb 02 0849 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Feb 02 0739 UTC
Maximum Time: 2026 Feb 02 0813 UTC
End Time: 2026 Feb 02 0842 UTC
X-ray Class: X1.6
Location: N16E26
NOAA Scale: R3 - Strong
Comment: Source AR 4366. Unkown if ejecta at this time.
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.
07:58 UTC
Space Weather Message Code: ALTXMF
Serial Number: 515
Issue Time: 2026 Feb 02 0758 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 02 0754 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.
05:00 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3618
Issue Time: 2026 Feb 02 0500 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3617
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 10157 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
03:09 UTC
Space Weather Message Code: SUMXM5
Serial Number: 307
Issue Time: 2026 Feb 02 0309 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 02 0245 UTC
Maximum Time: 2026 Feb 02 0251 UTC
End Time: 2026 Feb 02 0259 UTC
X-ray Class: M5.2
Location: N14E35
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.
02:52 UTC
Space Weather Message Code: ALTXMF
Serial Number: 514
Issue Time: 2026 Feb 02 0252 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 02 0249 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.
01:20 UTC
Space Weather Message Code: SUMX01
Serial Number: 208
Issue Time: 2026 Feb 02 0120 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Feb 02 0031 UTC
Maximum Time: 2026 Feb 02 0036 UTC
End Time: 2026 Feb 02 0040 UTC
X-ray Class: X2.8
Location: N14E36
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.
00:21 UTC
Space Weather Message Code: SUMX01
Serial Number: 207
Issue Time: 2026 Feb 02 0021 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Feb 01 2344 UTC
Maximum Time: 2026 Feb 01 2357 UTC
End Time: 2026 Feb 02 0004 UTC
X-ray Class: X8.1
Location: N14E34
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.
domenica, 1 febbraio PM
23:56 UTC
Space Weather Message Code: ALTXMF
Serial Number: 513
Issue Time: 2026 Feb 01 2356 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 01 2356 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.
16:29 UTC
Space Weather Message Code: SUMXM5
Serial Number: 306
Issue Time: 2026 Feb 01 1629 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 01 1557 UTC
Maximum Time: 2026 Feb 01 1605 UTC
End Time: 2026 Feb 01 1616 UTC
X-ray Class: M5.1
Location: N17E40
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.
16:08 UTC
Space Weather Message Code: ALTXMF
Serial Number: 512
Issue Time: 2026 Feb 01 1608 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 01 1608 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.
13:13 UTC
Space Weather Message Code: SUMXM5
Serial Number: 305
Issue Time: 2026 Feb 01 1313 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 01 1245 UTC
Maximum Time: 2026 Feb 01 1250 UTC
End Time: 2026 Feb 01 1304 UTC
X-ray Class: M5.8
Location: N16E36
NOAA Scale: R2 - Moderate
Comment: Additional flaring from Region 4366. No radio sweeps reported by USAF observatories indicating a CME at this time.
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.
12:55 UTC
Space Weather Message Code: ALTXMF
Serial Number: 511
Issue Time: 2026 Feb 01 1255 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 01 1248 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.
12:53 UTC
Space Weather Message Code: SUMX01
Serial Number: 206
Issue Time: 2026 Feb 01 1253 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Feb 01 1152 UTC
Maximum Time: 2026 Feb 01 1233 UTC
End Time: 2026 Feb 01 1238 UTC
X-ray Class: X1.0
Location: N16E37
NOAA Scale: R3 - Strong
Comment: Double peak flare with M6.7 and X1.0 peaks.
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.
12:12 UTC
Space Weather Message Code: ALTXMF
Serial Number: 510
Issue Time: 2026 Feb 01 1212 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 01 1209 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.
10:18 UTC
Space Weather Message Code: SUMXM5
Serial Number: 304
Issue Time: 2026 Feb 01 1018 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Feb 01 0953 UTC
Maximum Time: 2026 Feb 01 1002 UTC
End Time: 2026 Feb 01 1006 UTC
X-ray Class: M6.6
Location: N16E39
NOAA Scale: R2 - Moderate
Comment: Flare originated from AR 4366 and appears to be impulsive in nature at this time.
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.
10:05 UTC
Space Weather Message Code: ALTXMF
Serial Number: 509
Issue Time: 2026 Feb 01 1005 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Feb 01 1001 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.
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3617
Issue Time: 2026 Feb 01 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3616
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 11100 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
sabato, 31 gennaio AM
05:03 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3616
Issue Time: 2026 Jan 31 0503 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3615
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 9214 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
venerdì, 30 gennaio AM
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3615
Issue Time: 2026 Jan 30 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3614
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 8017 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
giovedì, 29 gennaio PM
20:39 UTC
Space Weather Message Code: WARK04
Serial Number: 5243
Issue Time: 2026 Jan 29 2039 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5242
Valid From: 2026 Jan 27 2103 UTC
Now Valid Until: 2026 Jan 30 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.
11:39 UTC
Space Weather Message Code: WARK04
Serial Number: 5242
Issue Time: 2026 Jan 29 1139 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5241
Valid From: 2026 Jan 27 2103 UTC
Now Valid Until: 2026 Jan 29 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.
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3614
Issue Time: 2026 Jan 29 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3613
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 10382 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
mercoledì, 28 gennaio PM
23:27 UTC
Space Weather Message Code: ALTK05
Serial Number: 1962
Issue Time: 2026 Jan 28 2327 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 28 2321 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.
22:17 UTC
Space Weather Message Code: WARK05
Serial Number: 2185
Issue Time: 2026 Jan 28 2217 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2184
Valid From: 2026 Jan 28 1534 UTC
Now Valid Until: 2026 Jan 29 0900 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 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.
22:17 UTC
Space Weather Message Code: WARK04
Serial Number: 5241
Issue Time: 2026 Jan 28 2217 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5240
Valid From: 2026 Jan 27 2103 UTC
Now Valid Until: 2026 Jan 29 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.
15:35 UTC
Space Weather Message Code: WARK05
Serial Number: 2184
Issue Time: 2026 Jan 28 1535 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Jan 28 1534 UTC
Valid To: 2026 Jan 28 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.
14:30 UTC
Space Weather Message Code: ALTK04
Serial Number: 2626
Issue Time: 2026 Jan 28 1430 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Jan 28 1425 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.
07:29 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3613
Issue Time: 2026 Jan 28 0729 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3612
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 13181 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
martedì, 27 gennaio PM
21:04 UTC
Space Weather Message Code: WARK04
Serial Number: 5240
Issue Time: 2026 Jan 27 2104 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Jan 27 2103 UTC
Valid To: 2026 Jan 28 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.
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3612
Issue Time: 2026 Jan 27 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3611
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 8394 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
lunedì, 26 gennaio AM
09:06 UTC
Space Weather Message Code: WATA20
Serial Number: 1091
Issue Time: 2026 Jan 26 0906 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Jan 27: None (Below G1) Jan 28: G1 (Minor) Jan 29: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Negative polarity CH influences will likely lead to isolated G1 (Minor) geomanetic storming periods on 28 Jan.
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.
05:01 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3611
Issue Time: 2026 Jan 26 0501 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3610
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 6155 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
domenica, 25 gennaio PM
17:54 UTC
Space Weather Message Code: WARK04
Serial Number: 5239
Issue Time: 2026 Jan 25 1754 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5238
Valid From: 2026 Jan 25 0245 UTC
Now Valid Until: 2026 Jan 26 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.
11:50 UTC
Space Weather Message Code: WARK04
Serial Number: 5238
Issue Time: 2026 Jan 25 1150 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5237
Valid From: 2026 Jan 25 0245 UTC
Now Valid Until: 2026 Jan 25 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 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.
05:00 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3610
Issue Time: 2026 Jan 25 0500 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3609
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 5171 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
02:48 UTC
Space Weather Message Code: WARK04
Serial Number: 5237
Issue Time: 2026 Jan 25 0248 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Jan 25 0245 UTC
Valid To: 2026 Jan 25 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.
sabato, 24 gennaio PM
17:52 UTC
Space Weather Message Code: WARK04
Serial Number: 5236
Issue Time: 2026 Jan 24 1752 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5235
Valid From: 2026 Jan 22 2224 UTC
Now Valid Until: 2026 Jan 24 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.
05:00 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3609
Issue Time: 2026 Jan 24 0500 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3608
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 3392 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
02:57 UTC
Space Weather Message Code: WARK05
Serial Number: 2183
Issue Time: 2026 Jan 24 0257 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2182
Valid From: 2026 Jan 22 2325 UTC
Now Valid Until: 2026 Jan 24 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.
02:56 UTC
Space Weather Message Code: WARK04
Serial Number: 5235
Issue Time: 2026 Jan 24 0256 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5234
Valid From: 2026 Jan 22 2224 UTC
Now Valid Until: 2026 Jan 24 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.
venerdì, 23 gennaio PM
20:56 UTC
Space Weather Message Code: WARK04
Serial Number: 5234
Issue Time: 2026 Jan 23 2056 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5233
Valid From: 2026 Jan 22 2224 UTC
Now Valid Until: 2026 Jan 24 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.
20:56 UTC
Space Weather Message Code: WARK05
Serial Number: 2182
Issue Time: 2026 Jan 23 2056 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2181
Valid From: 2026 Jan 22 2325 UTC
Now Valid Until: 2026 Jan 24 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 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.
14:56 UTC
Space Weather Message Code: WARK04
Serial Number: 5233
Issue Time: 2026 Jan 23 1456 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5232
Valid From: 2026 Jan 22 2224 UTC
Now Valid Until: 2026 Jan 23 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.
14:56 UTC
Space Weather Message Code: WARK05
Serial Number: 2181
Issue Time: 2026 Jan 23 1456 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2180
Valid From: 2026 Jan 22 2325 UTC
Now Valid Until: 2026 Jan 23 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.
09:03 UTC
Space Weather Message Code: WARK04
Serial Number: 5232
Issue Time: 2026 Jan 23 0903 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5231
Valid From: 2026 Jan 22 2224 UTC
Now Valid Until: 2026 Jan 23 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.
08:54 UTC
Space Weather Message Code: WARK05
Serial Number: 2180
Issue Time: 2026 Jan 23 0854 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2179
Valid From: 2026 Jan 22 2325 UTC
Now Valid Until: 2026 Jan 23 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 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.
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3608
Issue Time: 2026 Jan 23 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3607
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 5365 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
00:00 UTC
Space Weather Message Code: WARK04
Serial Number: 5231
Issue Time: 2026 Jan 23 0000 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5230
Valid From: 2026 Jan 22 2224 UTC
Now Valid Until: 2026 Jan 23 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.
giovedì, 22 gennaio PM
23:39 UTC
Space Weather Message Code: WARK06
Serial Number: 638
Issue Time: 2026 Jan 22 2339 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Jan 22 2339 UTC
Valid To: 2026 Jan 23 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.
23:29 UTC
Space Weather Message Code: ALTK05
Serial Number: 1961
Issue Time: 2026 Jan 22 2329 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 22 2327 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.
23:25 UTC
Space Weather Message Code: WARK05
Serial Number: 2179
Issue Time: 2026 Jan 22 2325 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Jan 22 2325 UTC
Valid To: 2026 Jan 23 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.
23:00 UTC
Space Weather Message Code: ALTK04
Serial Number: 2625
Issue Time: 2026 Jan 22 2300 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Jan 22 2254 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.
22:24 UTC
Space Weather Message Code: WARK04
Serial Number: 5230
Issue Time: 2026 Jan 22 2224 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Jan 22 2224 UTC
Valid To: 2026 Jan 23 0900 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.
17:54 UTC
Space Weather Message Code: SUMPX1
Serial Number: 127
Issue Time: 2026 Jan 22 1754 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026 Jan 18 2255 UTC
Maximum Time: 2026 Jan 19 1915 UTC
End Time: 2026 Jan 22 0545 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
11:03 UTC
Space Weather Message Code: WARPX1
Serial Number: 623
Issue Time: 2026 Jan 22 1103 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 622
Valid From: 2026 Jan 22 0124 UTC
Now Valid Until: 2026 Jan 22 1800 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.
05:37 UTC
Space Weather Message Code: ALTPX1
Serial Number: 363
Issue Time: 2026 Jan 22 0537 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026 Jan 22 0520 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.
04:59 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3607
Issue Time: 2026 Jan 22 0459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3606
Begin Time: 2026 Jan 21 0950 UTC
Yesterday Maximum 2MeV Flux: 3332 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
01:24 UTC
Space Weather Message Code: WARPX1
Serial Number: 622
Issue Time: 2026 Jan 22 0124 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026 Jan 22 0124 UTC
Valid To: 2026 Jan 22 1200 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.
mercoledì, 21 gennaio AM
10:56 UTC
Space Weather Message Code: WARK04
Serial Number: 5229
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5228
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 22 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.
10:56 UTC
Space Weather Message Code: WARK05
Serial Number: 2178
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2177
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 22 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.
10:56 UTC
Space Weather Message Code: WARK06
Serial Number: 637
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 636
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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 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.
10:56 UTC
Space Weather Message Code: WARK07
Serial Number: 144
Issue Time: 2026 Jan 21 1056 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 143
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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 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.
10:37 UTC
Space Weather Message Code: ALTK06
Serial Number: 695
Issue Time: 2026 Jan 21 1037 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 21 1037 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.
10:06 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3606
Issue Time: 2026 Jan 21 1006 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Jan 21 0950 UTC
Station: GOES19
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
09:48 UTC
Space Weather Message Code: ALTK05
Serial Number: 1960
Issue Time: 2026 Jan 21 0948 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 21 0948 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.
08:53 UTC
Space Weather Message Code: ALTK07
Serial Number: 211
Issue Time: 2026 Jan 21 0853 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 21 0852 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.
07:31 UTC
Space Weather Message Code: WATA20
Serial Number: 1090
Issue Time: 2026 Jan 21 0731 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Jan 22: G1 (Minor) Jan 23: None (Below G1) Jan 24: 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.
07:27 UTC
Space Weather Message Code: ALTK06
Serial Number: 694
Issue Time: 2026 Jan 21 0727 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 21 0723 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.
07:10 UTC
Space Weather Message Code: ALTK05
Serial Number: 1959
Issue Time: 2026 Jan 21 0710 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 21 0704 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.
05:11 UTC
Space Weather Message Code: ALTK07
Serial Number: 210
Issue Time: 2026 Jan 21 0511 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 21 0507 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.
04:47 UTC
Space Weather Message Code: ALTK06
Serial Number: 693
Issue Time: 2026 Jan 21 0447 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 21 0439 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.
03:54 UTC
Space Weather Message Code: ALTK05
Serial Number: 1958
Issue Time: 2026 Jan 21 0354 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 21 0349 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.
02:20 UTC
Space Weather Message Code: ALTK07
Serial Number: 209
Issue Time: 2026 Jan 21 0220 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 21 0213 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.
02:01 UTC
Space Weather Message Code: WARK04
Serial Number: 5228
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5227
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 21 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.
02:01 UTC
Space Weather Message Code: WARK05
Serial Number: 2177
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2176
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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.
02:01 UTC
Space Weather Message Code: WARK07
Serial Number: 143
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 142
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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.
02:01 UTC
Space Weather Message Code: WARK06
Serial Number: 636
Issue Time: 2026 Jan 21 0201 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 635
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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 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.
01:55 UTC
Space Weather Message Code: SUMPX2
Serial Number: 59
Issue Time: 2026 Jan 21 0155 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026 Jan 19 0440 UTC
Maximum Time: 2026 Jan 19 1915 UTC
End Time: 2026 Jan 20 1335 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
00:35 UTC
Space Weather Message Code: ALTK06
Serial Number: 692
Issue Time: 2026 Jan 21 0035 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 21 0032 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.
00:28 UTC
Space Weather Message Code: ALTK05
Serial Number: 1957
Issue Time: 2026 Jan 21 0028 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 21 0013 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.
00:08 UTC
Space Weather Message Code: ALTK08
Serial Number: 59
Issue Time: 2026 Jan 21 0008 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026 Jan 20 2359 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.
martedì, 20 gennaio PM
23:55 UTC
Space Weather Message Code: WARPX1
Serial Number: 621
Issue Time: 2026 Jan 20 2355 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 620
Valid From: 2026 Jan 18 2130 UTC
Now Valid Until: 2026 Jan 21 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.
22:42 UTC
Space Weather Message Code: ALTK07
Serial Number: 208
Issue Time: 2026 Jan 20 2242 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 20 2243 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.
22:33 UTC
Space Weather Message Code: ALTK06
Serial Number: 691
Issue Time: 2026 Jan 20 2233 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 2230 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.
21:35 UTC
Space Weather Message Code: ALTK05
Serial Number: 1956
Issue Time: 2026 Jan 20 2135 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 2134 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.
19:53 UTC
Space Weather Message Code: WARK06
Serial Number: 635
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 634
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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.
19:53 UTC
Space Weather Message Code: WARK07
Serial Number: 142
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 141
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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.
19:53 UTC
Space Weather Message Code: WARK04
Serial Number: 5227
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5226
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 21 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.
19:53 UTC
Space Weather Message Code: WARK05
Serial Number: 2176
Issue Time: 2026 Jan 20 1953 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2175
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 21 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 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.
19:49 UTC
Space Weather Message Code: ALTK07
Serial Number: 207
Issue Time: 2026 Jan 20 1949 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 20 1945 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.
18:56 UTC
Space Weather Message Code: ALTK06
Serial Number: 690
Issue Time: 2026 Jan 20 1856 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 1852 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.
18:23 UTC
Space Weather Message Code: ALTK05
Serial Number: 1955
Issue Time: 2026 Jan 20 1823 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 1818 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.
17:27 UTC
Space Weather Message Code: ALTK07
Serial Number: 206
Issue Time: 2026 Jan 20 1727 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 20 1724 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.
15:30 UTC
Space Weather Message Code: ALTK06
Serial Number: 689
Issue Time: 2026 Jan 20 1530 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 1523 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.
15:19 UTC
Space Weather Message Code: ALTK05
Serial Number: 1954
Issue Time: 2026 Jan 20 1519 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 1513 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.
14:56 UTC
Space Weather Message Code: WARK07
Serial Number: 141
Issue Time: 2026 Jan 20 1456 UTC
EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 140
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 20 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 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.
14:56 UTC
Space Weather Message Code: WARK06
Serial Number: 634
Issue Time: 2026 Jan 20 1456 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 633
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 20 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 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.
12:48 UTC
Space Weather Message Code: ALTK07
Serial Number: 205
Issue Time: 2026 Jan 20 1248 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 20 1247 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.
12:29 UTC
Space Weather Message Code: ALTK06
Serial Number: 688
Issue Time: 2026 Jan 20 1229 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 1229 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.
12:11 UTC
Space Weather Message Code: ALTK05
Serial Number: 1953
Issue Time: 2026 Jan 20 1211 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 1210 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.
10:22 UTC
Space Weather Message Code: ALTK08
Serial Number: 58
Issue Time: 2026 Jan 20 1022 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026 Jan 20 1021 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.
09:43 UTC
Space Weather Message Code: ALTK07
Serial Number: 204
Issue Time: 2026 Jan 20 0943 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 20 0943 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: 687
Issue Time: 2026 Jan 20 0928 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 0927 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.
09:17 UTC
Space Weather Message Code: ALTK05
Serial Number: 1952
Issue Time: 2026 Jan 20 0917 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 0917 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.
08:23 UTC
Space Weather Message Code: ALTK08
Serial Number: 57
Issue Time: 2026 Jan 20 0823 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026 Jan 20 0823 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.
08:00 UTC
Space Weather Message Code: ALTK07
Serial Number: 203
Issue Time: 2026 Jan 20 0800 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 20 0752 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.
07:36 UTC
Space Weather Message Code: ALTK06
Serial Number: 686
Issue Time: 2026 Jan 20 0736 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 0730 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.
07:05 UTC
Space Weather Message Code: ALTK05
Serial Number: 1951
Issue Time: 2026 Jan 20 0705 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 0658 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.
06:03 UTC
Space Weather Message Code: ALTK06
Serial Number: 685
Issue Time: 2026 Jan 20 0603 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 0559 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.
04:09 UTC
Space Weather Message Code: ALTK05
Serial Number: 1949
Issue Time: 2026 Jan 20 0409 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 0403 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.
04:06 UTC
Space Weather Message Code: ALTK05
Serial Number: 1949
Issue Time: 2026 Jan 20 0406 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 0403 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.
01:03 UTC
Space Weather Message Code: SUMPX3
Serial Number: 22
Issue Time: 2026 Jan 20 0103 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2026 Jan 19 1020 UTC
Maximum Time: 2026 Jan 19 1915 UTC
End Time: 2026 Jan 19 2135 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
00:14 UTC
Space Weather Message Code: ALTK06
Serial Number: 684
Issue Time: 2026 Jan 20 0014 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 20 0016 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.
00:12 UTC
Space Weather Message Code: ALTK05
Serial Number: 1948
Issue Time: 2026 Jan 20 0012 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 20 0008 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.
lunedì, 19 gennaio PM
23:21 UTC
Space Weather Message Code: SUMPX4
Serial Number: 2
Issue Time: 2026 Jan 19 2321 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10000pfu
Begin Time: 2026 Jan 19 1810 UTC
Maximum Time: 2026 Jan 19 1915 UTC
End Time: 2026 Jan 19 2045 UTC
Maximum 10MeV Flux: 37000 pfu
NOAA Scale: S4 - Severe
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
21:56 UTC
Space Weather Message Code: SUMSUD
Serial Number: 294
Issue Time: 2026 Jan 19 2156 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Jan 19 2134 UTC
Deviation: 481 nT
Station: WNG
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
21:17 UTC
Space Weather Message Code: ALTK08
Serial Number: 56
Issue Time: 2026 Jan 19 2117 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026 Jan 19 2119 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.
21:14 UTC
Space Weather Message Code: ALTK07
Serial Number: 202
Issue Time: 2026 Jan 19 2114 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 19 2114 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.
21:09 UTC
Space Weather Message Code: ALTK06
Serial Number: 683
Issue Time: 2026 Jan 19 2109 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 19 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.
21:09 UTC
Space Weather Message Code: ALTK05
Serial Number: 1947
Issue Time: 2026 Jan 19 2109 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 19 2109 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.
19:43 UTC
Space Weather Message Code: ALTK08
Serial Number: 55
Issue Time: 2026 Jan 19 1943 UTC
ALERT: Geomagnetic K-index of 8, 9-
Threshold Reached: 2026 Jan 19 1938 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G4 - Severe
Comment: Currently at a Kp8-
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.
19:36 UTC
Space Weather Message Code: SUMSUD
Serial Number: 293
Issue Time: 2026 Jan 19 1936 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Jan 19 1920 UTC
Deviation: 97 nT
Station: BOU
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
19:30 UTC
Space Weather Message Code: ALTK07
Serial Number: 201
Issue Time: 2026 Jan 19 1930 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026 Jan 19 1931 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.
19:28 UTC
Space Weather Message Code: WARK04
Serial Number: 5226
Issue Time: 2026 Jan 19 1928 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5225
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 21 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.
19:27 UTC
Space Weather Message Code: WARK05
Serial Number: 2175
Issue Time: 2026 Jan 19 1927 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2174
Valid From: 2026 Jan 19 1902 UTC
Now Valid Until: 2026 Jan 20 2359 UTC
Warning Condition: Persistence
Comment: Correction for end time.
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.
19:24 UTC
Space Weather Message Code: ALTK06
Serial Number: 682
Issue Time: 2026 Jan 19 1924 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jan 19 1923 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.
19:22 UTC
Space Weather Message Code: ALTK05
Serial Number: 1946
Issue Time: 2026 Jan 19 1922 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jan 19 1922 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.
19:09 UTC
Space Weather Message Code: WARSUD
Serial Number: 249
Issue Time: 2026 Jan 19 1909 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Jan 19 1920 UTC
Valid To: 2026 Jan 19 2000 UTC
IP Shock Passage Observed: 2026 Jan 19 1903 UTC
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
19:06 UTC
Space Weather Message Code: WARK06
Serial Number: 633
Issue Time: 2026 Jan 19 1906 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Jan 19 1902 UTC
Valid To: 2026 Jan 20 1800 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.
19:06 UTC
Space Weather Message Code: WARK05
Serial Number: 2174
Issue Time: 2026 Jan 19 1906 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Jan 19 1902 UTC
Valid To: 2026 Jan 20 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.
19:06 UTC
Space Weather Message Code: WARK07
Serial Number: 140
Issue Time: 2026 Jan 19 1906 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026 Jan 19 1902 UTC
Valid To: 2026 Jan 20 1500 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.
18:19 UTC
Space Weather Message Code: ALTPX4
Serial Number: 2
Issue Time: 2026 Jan 19 1819 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10000pfu
Begin Time: 2026 Jan 19 1810 UTC
NOAA Scale: S4 - Severe
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 significant radiation exposures. Astronauts on EVA (extra-vehicular activity) are exposed to unavoidable radiation hazard.
Spacecraft - Satellites may experience memory device problems and noise on imaging systems; star-trackers may cause orientation problems; solar panel efficiency may be degraded.
Radio - Widespread blackout of polar HF (high frequency) communications likely.
18:14 UTC
Space Weather Message Code: WARPX1
Serial Number: 620
Issue Time: 2026 Jan 19 1814 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 619
Valid From: 2026 Jan 18 2130 UTC
Now Valid Until: 2026 Jan 20 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Comment: This warning UPGRADED from S3 (Strong) to S4 (Severe) due to increasing Proton flux levels.
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.
12:03 UTC
Space Weather Message Code: WATA99
Serial Number: 13
Issue Time: 2026 Jan 19 1203 UTC
WATCH: Geomagnetic Storm Category G4 or Greater Predicted
Highest Storm Level Predicted by Day:
Jan 20: G4 (Severe) Jan 21: G1 (Minor) Jan 22: 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 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.
10:29 UTC
Space Weather Message Code: ALTPX3
Serial Number: 34
Issue Time: 2026 Jan 19 1029 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 1000pfu
Begin Time: 2026 Jan 19 1020 UTC
NOAA Scale: S3 - Strong
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 increasing radiation exposures. Astronauts on EVA (extra-vehicular activity) are exposed to elevated radiation levels.
Spacecraft - Single-event upsets to satellite operations, noise in imaging systems, and slight reduction of efficiency in solar panels are likely.
Radio - Degraded or episodically blacked-out polar HF (high frequency) radio propagation.
10:29 UTC
Space Weather Message Code: WARPX1
Serial Number: 619
Issue Time: 2026 Jan 19 1029 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 618
Valid From: 2026 Jan 18 2130 UTC
Now Valid Until: 2026 Jan 20 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S3 - Strong
Comment: This warning UPGRADED from S2 (Moderate) to S3 (Strong) due to increasing Proton flux levels.
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.
05:00 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3605
Issue Time: 2026 Jan 19 0500 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3604
Begin Time: 2026 Jan 12 1040 UTC
Yesterday Maximum 2MeV Flux: 4619 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
04:47 UTC
Space Weather Message Code: ALTPX2
Serial Number: 80
Issue Time: 2026 Jan 19 0447 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 100pfu
Begin Time: 2026 Jan 19 0440 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.
04:11 UTC
Space Weather Message Code: WARPX1
Serial Number: 618
Issue Time: 2026 Jan 19 0411 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 617
Valid From: 2026 Jan 18 2130 UTC
Now Valid Until: 2026 Jan 19 2359 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S2 - Moderate
Comment: This warning UPGRADED from S1 (Minor) to S2 (Moderate) due to increasing Proton flux levels.
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.
domenica, 18 gennaio PM
23:54 UTC
Space Weather Message Code: WARK04
Serial Number: 5225
Issue Time: 2026 Jan 18 2354 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5224
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 19 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.
23:11 UTC
Space Weather Message Code: ALTPX1
Serial Number: 362
Issue Time: 2026 Jan 18 2311 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2026 Jan 18 2255 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.
21:30 UTC
Space Weather Message Code: WARPX1
Serial Number: 617
Issue Time: 2026 Jan 18 2130 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026 Jan 18 2130 UTC
Valid To: 2026 Jan 19 1200 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.
19:55 UTC
Space Weather Message Code: SUM10R
Serial Number: 899
Issue Time: 2026 Jan 18 1955 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2026 Jan 18 1739 UTC
Maximum Time: 2026 Jan 18 1757 UTC
End Time: 2026 Jan 18 1944 UTC
Duration: 122 minutes
Peak Flux: 3200 sfu
Latest Penticton Noon Flux: 148 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.
19:00 UTC
Space Weather Message Code: SUMX01
Serial Number: 205
Issue Time: 2026 Jan 18 1900 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2026 Jan 18 1727 UTC
Maximum Time: 2026 Jan 18 1809 UTC
End Time: 2026 Jan 18 1851 UTC
X-ray Class: X1.9
Optical Class: 3b
Location: S12E20
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.
18:47 UTC
Space Weather Message Code: ALTTP2
Serial Number: 1466
Issue Time: 2026 Jan 18 1847 UTC
ALERT: Type II Radio Emission
Begin Time: 2026 Jan 18 1759 UTC
Estimated Velocity: 693 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.
18:13 UTC
Space Weather Message Code: ALTTP4
Serial Number: 704
Issue Time: 2026 Jan 18 1813 UTC
ALERT: Type IV Radio Emission
Begin Time: 2026 Jan 18 1748 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.
17:52 UTC
Space Weather Message Code: ALTXMF
Serial Number: 508
Issue Time: 2026 Jan 18 1752 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Jan 18 1752 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.
06:02 UTC
Space Weather Message Code: ALTEF3
Serial Number: 3604
Issue Time: 2026 Jan 18 0602 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3603
Begin Time: 2026 Jan 12 1040 UTC
Yesterday Maximum 2MeV Flux: 2763 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
sabato, 17 gennaio PM
22:36 UTC
Space Weather Message Code: WARK04
Serial Number: 5224
Issue Time: 2026 Jan 17 2236 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5223
Valid From: 2026 Jan 16 0254 UTC
Now Valid Until: 2026 Jan 18 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.
Ultime notizie
Complex sunspot region 4366
CME impact! S4 solar radiation storm
X1.9 solar flare with earth-directed CME
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Notizie sul meteo spaziale
| Ultimo brillamento X | 2026/02/04 | X4.21 |
| Ultimo brillamento M | 2026/02/16 | M2.4 |
| Ultima tempesta geomagnetica | 2026/02/15 | Kp5+ (G1) |
| Giorni senza macchie | |
|---|---|
| Ultimo giorno senza macchie | 2022/06/08 |
| Media mensile Numero di Macchie Solari | |
|---|---|
| gennaio 2026 | 112.6 -11.4 |
| febbraio 2026 | 109 -3.6 |
| Ultimi 30 giorni | 126.1 +25.9 |