Het archief bekijken van maandag 17 maart 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Mar 17 1237 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Active conditions expected (A>=20 or K=4)

Proton Flux monitor

Quiet

	10cm flux	Ap
17 Mar 2025	190	016
18 Mar 2025	194	013
19 Mar 2025	198	005

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was low over the past 24 hours, with C-class flares identified. The largest flare was a C7.8 flare peaking on March 17 at 05:42 UTC, which was produced by SIDC Sunspot Group 405 (NOAA Active Region 4028). This region along with SIDC Sunspot Groups 436 and SIDC 440 (NOAA Active Region 4025 and 4031) are the largest and most complex regions on disk. There are currently a total of 13 numbered sunspot groups on disk. 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

An eruption seen in SDO/AIA imagery from 08:52 UTC in the northern hemisphere is likely associated with a faint Coronal Mass Ejection seen in SOHO/LASCO-C2 data from 10:50 UTC March 16. This CME is directed to the north-west and predominantly above the sun Earth and is therefore not expected to impact Earth. A faint partial halo CME was observed to the north-east first seen in SOHO/LASCO-C2 data from 20:12 UTC March 16, coinciding with a narrower CME to the north. Initial analysis suggested the narrower CME maybe associated with an on disk eruption while the partial halo may be associated with a back-sided event.

Zonnewind

The solar wind conditions reflected the waning high speed stream influence. The solar wind speed decreased from 450 to 400 km/s. The interplanetary magnetic field ranged between 5 and 7 nT with a minimum Bz value of -5 nT. The solar wind speed is expected to be slightly elevated on March 17 and 18, due to the influence of the high-speed stream associated with the negative polarity coronal hole which began to cross the central meridian March 13.

Geomagnetisme

In the past 24 hours, geomagnetic conditions were quiet to unsettled (Kp = 3) with an isolated active period as measured by K bel. Geomagnetic conditions are expected to be at quiet to unsettled levels with intervals of active periods possible on March 17 and 18 due to the continued possible high-speed stream effects.

Proton flux niveaus

The greater than 10 MeV proton flux as measured by GOES-18 remained below the 10 pfu threshold and is expected to remain so over the next days.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux exceeded the 1000 pfu threshold for most the past 24 hours and is expected to be above the threshold during the next 24 hours. The 24h electron fluence was at moderate levels and is expected to remain so.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 199, gebaseerd op 08 stations.

Zon indexen voor 16 Mar 2025

Wolfgetal Catania	///
10cm zonneflux	186
AK Chambon La Forêt	019
AK Wingst	011
Geschatte Ap	011
Geschat internationaal zonnevlekkengetal	205 - Gebaseerd op 21 stations

Overzicht opvallende gebeurtenissen

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

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