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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2024 Feb 20 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
20 Feb 2024	148	008
21 Feb 2024	146	010
22 Feb 2024	144	010

Solar Active Regions and flaring

Solar flaring activity over the past 24 hours was at low levels. The largest flare was a C5.7-flare, with peak time 12:47 UTC on February 19, associated with NOAA AR 3590 (beta-gamma). There are currently 5 numbered active regions on the visible disk. NOAA AR 3590 (beta-gamma), NOAA AR 3586 (beta) and NOAA AR 3583 (beta) are the most magnetically complex region. NOAA AR 3583 are NOAA AR 3581 (alfa) are rotating over the west limb. All other regions on disk have simple magnetic configuration and did not show any significant flaring activity. The solar flaring activity is likely to be at low levels over the coming days with C-class flares expected and M-class flares possible.

Espulsioni di massa coronale

A Coronal Mass Ejection (CME), was detected at 23:24 UTC on February 19, in LASCO C2 data. The CME is associated with an eruption seen in SDO/AIA 193 at 22:58 UTC on February 19 associated with NOAA AR 3583. Further analysis is ongoing.

Vento solare

Slow solar wind conditions were recorded over the past 24 hours. The solar wind speed as measured by ACE, fluctuated between 280 km/s and 357 km/s. The interplanetary magnetic field fluctuated between 2 nT and 8 nT, with the Bz reaching a minimum value of -7 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

The geomagnetic conditions over the past 24 hours were globally and locally quiet (Kp 2 and K Bel 2). Geomagnetic conditions are expected to be at quiet levels over the next 24 hours.

Proton flux levels

Over the past 24 hours the greater than 10 MeV GOES proton flux continued to decrease and, although still slightly elevated, remained below the 10 pfu threshold. The proton flux is expected to continue to decrease over the next 24 hours.

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): 049, based on 17 stations.

Solar indices for 19 Feb 2024

Wolf number Catania	///
10cm solar flux	152
AK Chambon La Forêt	006
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	075 - Based on 17 stations

Noticeable events summary

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

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