Het archief bekijken van donderdag 20 maart 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Mar 20 1240 UTC

SIDC Prognose

Zonnevlammen

M-class flares expected (probability >=50%)

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
20 Mar 2025	176	010
21 Mar 2025	170	010
22 Mar 2025	164	011

Zonnevlekkengebieden en zonnevlammen

A total of 10 numbered sunspot groups were identified on the disk over the past 24 hours. Solar flaring activity was moderate, with 1 M-class flare identified. The largest flare was a M1.5 flare (SIDC Flare 3879) peaking on March 19 at 20:40 UTC, which was produced by SIDC Sunspot Group 440 (NOAA Active Region 4031). This region is the most magnetically complex region on disk with a Beta-Gamma magnetic configuration. SIDC 433 (NOAA 4022) has started to rotate over the west limb. Solar flaring activity is expected to be moderate over the next 24 hours, with C-class flares expected and M-class flares likely.

Coronale massa uitstoten

A filament eruption on the west limb was detected in SDO/AIA 30.4 nm imagery around 22:50 UTC on March 19. An associated coronal mass ejection (CME) is visible in LASCO/C2 imagery around 23:36 UTC on March 19. The CME is not expected to arrive at Earth. No other CMEs have been detected in the available coronagraph images.

Coronale gaten

SIDC Coronal Hole 93 (equatorial coronal hole with a negative polarity) which started to cross the central meridian on March 19 is still residing on the central meridian. The high-speed stream emanating from this coronal hole is expected to arrive at Earth on March 23.

Zonnewind

In the past 24 hours solar wind conditions at Earth were under the waning influence of a high-speed stream (HSS). The total interplanetary magnetic ranged from 3 nT to 8 nT, with the Bz component reaching a minimum of -7 nT. The solar wind speed ranged from 427 km/s to 520 km/s. The phi- angle was mainly in the negative sector (directed towards the Sun) with periods in the positive sector. The solar wind conditions are expected to return towards slow solar wind levels over the next 24 hours.

Geomagnetisme

The geomagnetic conditions over the past 24 hours reached minor storm conditions globally (Kp 5) and active conditions (K BEL 4). Predominantly quiet to unsettled geomagnetic conditions are expected for the next 24 hours.

Proton flux niveaus

Over the past 24 hours, the greater than 10 MeV GOES proton flux was at background levels and is expected to remain so over the next days.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux, as measured by GOES-18 satellites, exceeded the 1000 pfu threshold between 18:05 UTC and 23:50 UTC on March 19. The electron flux is expected to remain below the threshold in the coming 24 hours. The 24h electron fluence is presently at normal level, and it is expected to remain so in the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 171, gebaseerd op 19 stations.

Zon indexen voor 19 Mar 2025

Wolfgetal Catania	///
10cm zonneflux	180
AK Chambon La Forêt	023
AK Wingst	018
Geschatte Ap	022
Geschat internationaal zonnevlekkengetal	170 - Gebaseerd op 24 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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