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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2024 Feb 23 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
23 Feb 2024	176	013
24 Feb 2024	180	007
25 Feb 2024	184	010

Solar Active Regions and flaring

Solar flaring activity over the past 24 hours was at high levels, with one X-class flares and one M-class flare. The largest flare was a X6.3-flare, with peak time 22:34 UTC on February 22 and the second largest flare was a M4.8-flare, with peak time 20:46 UTC on February 22. Both flares were associated with NOAA AR 3590 (beta-gamma- delta). The third largest flare a C9.4-flare, with peak time 16:29 UTC on February 22 was produced by a yet unnumbered active region behind the east- limb. There are currently 2 numbered active regions on the visible disk. NOAA AR 3590 (beta-gamma-delta) is the largest, most magnetically complex region and has produced most of the flaring activity in the last 24 hours. NOAA AR 3586 (alfa) has been stable and inactive. The solar flaring activity is likely to be at moderate levels over the coming days with C-class flares expected and M-class flares probable and a chance for an X-class flare.

Espulsioni di massa coronale

No Earth directed Coronal Mass Ejections (CME)s have been observed in the last 24 hours.

Fori coronali

Two negative polarity coronal holes are crossing the central meridian. One in the northern half of the Sun at high latitude and the other in the Southern half at low latitude. A high-speed stream from the southern coronal hole is expected to impact the Earth early on the 25th of November.

Vento solare

Slow solar wind conditions were recorded over the past 24 hours. The solar wind speed as measured by ACE fluctuated between 304 km/s to 368 km/s. The interplanetary magnetic field fluctuated between 1 nT and 7 nT, with the Bz reaching a minimum value of -5 nT. The phi-angle was in the positive sector (directed away the Sun) with periods on the negative sector. In the next 24-hours slow solar wind conditions are expected.

Geomagnetism

Geomagnetic conditions were globally and locally quiet (Kp 3 and K Bel 3) with some unsettled periods over the past 24 hours.

Proton flux levels

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next days. Some enhancements are possible in the case of an eruptive activity from NOAA AR 3590.

Electron fluxes at geostationary orbit

The greater than 2 MeV GOES 16 electron flux was below the 1000 pfu threshold and is expected to remain so in the upcoming days. The 24h electron fluence was at nominal level and is expected to remain so in the next days.

Today's estimated international sunspot number (ISN): 102, based on 08 stations.

Solar indices for 22 Feb 2024

Wolf number Catania	073
10cm solar flux	173
AK Chambon La Forêt	007
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	054 - Based on 12 stations

Noticeable events summary

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

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