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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Feb 23 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
23 Feb 2024	176	013
24 Feb 2024	180	007
25 Feb 2024	184	010

Régions solaires actives et éruptions solaires

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.

Éjection de masse coronale

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

Trous coronaux

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.

Vent solaire

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.

Géomagnétisme

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

Niveaux de flux de protons

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.

Flux d'électrons sur l'orbite géostationnaire

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.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 102, sur la base de 08 stations.

Indices solaires pour 22 Feb 2024

Nombre de Wolf, observé par Catania	073
Flux solaire à 10 cm	173
AK Chambon La Forêt	007
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	054 - Basé sur 12 stations

Résumé des événements marquants

Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive

Toutes les heures sont indiquées en UTC

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