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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2025 Mar 05 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
05 Mar 2025	161	008
06 Mar 2025	155	006
07 Mar 2025	150	005

Solar Active Regions and flaring

Solar flaring activity was moderate over the past 24 hours, with an M1.7 flare emitted from SIDC Sunspot Group 423 (NOAA Active Region 4012, at S13E28, Beta-Gamma magnetic configuration) 5 Mar at 11:50 UTC. During the next 24 hours further M-class flaring from the same SIDC sunspot group is likely to take place.

Espulsioni di massa coronale

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Vento solare

The Solar Wind (SW) conditions were affected by a minor glancing blow from a Coronal Mass Ejection (CME) launched on 1 Mar, that arrived a few hours earlier than expected. However, this event had a minor effect on the SW conditions that were mostly typical of the slow regime. The SW speed gradually decreased from 530 to 410 km/s, while the interplanetary magnetic field (B) ranged between 3 to 9 nT in the last 24 hours. Its North-South component (Bz) registered values between -8 and 7 nT during the same period. The SW conditions are expected to remain in the slow SW regime over the next 24 hours.

Geomagnetism

The geomagnetic conditions gradually reached active levels both globally and locally (NOAA Kp 4+ and K BEL 4) between 4 Mar 21:00 and 24:00 UTC. However, after 5 Mar 03:00 UTC the conditions dropped back to quiet levels and they are expected to raise up to unsettled levels both globally and locally in the next 24 hours.

Proton flux levels

The greater than 10 MeV proton flux, as measured by the GOES-18 satellite, was at nominal levels over the past 24 hours and is likely to remain so in the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by the GOES-18 satellite, marginally exceed the 1000 pfu threshold on 4 Mar between 18:05 and 23:45 UTC. For the next 24 hours it is expected to remain at this level. The 24h electron fluence decreased to normal levels over the past 24 hours. It is expected to remain at normal levels, but stay close to the moderate threshold during the next 24 hours.

Today's estimated international sunspot number (ISN): 148, based on 19 stations.

Solar indices for 04 Mar 2025

Wolf number Catania	189
10cm solar flux	160
AK Chambon La Forêt	026
AK Wingst	013
Estimated Ap	014
Estimated international sunspot number	159 - Based on 25 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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