Viewing archive of Tuesday, 4 March 2025

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2025 Mar 04 1237 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
04 Mar 2025	160	006
05 Mar 2025	165	009
06 Mar 2025	170	006

Solar Active Regions and flaring

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. SIDC Sunspot Group 368 (NOAA Active Region [AR] 4006, at N19W49, Beta magnetic configuration) has produced the brightest flare, a C3 on 4 Mar at 00:52. SIDC Sunspot Group 423 (NOAA AR 4012, at S13E47, Beta-Gamma magnetic configuration) also produced a significant number of C-class flares. SIDC Sunspot Group 416 (NOAA AR 4007, at S10W44, Beta-Gamma-Delta magnetic configuration) is magnetically the most complex on disk and is expected to increase its activity significantly in the next 24 hours. Further C-class flaring is expected, however increased activity to M-class level is also possible in the next 24 hours.

Coronal mass ejections

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

Solar wind

The Solar Wind (SW) conditions resembled the slow SW regime during the last 24 hours. The SW speed fluctuated between 420 and 560 km/s, while the interplanetary magnetic field (Bt) ranged between 2 to 9 nT in the last 24 hours. Its North-South component (Bz) registered values between -5 and 7 nT during the same period. Slow SW conditions are expected in the next 24 hours.

Geomagnetism

During the last 24 hours geomagnetic conditions were globally and locally quiet (NOAA Kp 1- to 2+, K BEL 2). In the next 24 hours they are expected to remain quiet both globally and locally.

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, reached but did not exceed the 1000 pfu threshold during the past 24 hours. For the next 24 hours it is expected to remain at this level and not exceed the said threshold. The 24h electron fluence reached the moderate levels over the past 24 hours. It is expected to marginally decrease to normal levels over the next 24 hours.

Today's estimated international sunspot number (ISN): 160, based on 17 stations.

Solar indices for 03 Mar 2025

Wolf number Catania	///
10cm solar flux	145
AK Chambon La Forêt	010
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	125 - Based on 23 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page