Affichage des archives de jeudi, 13 mars 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Mar 13 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 Mar 2025	165	024
14 Mar 2025	167	007
15 Mar 2025	168	007

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C6.8 flare (SIDC Flare 3823) peaking on March 13 at 07:52 UTC, which was produced by SIDC Sunspot Group 423 (NOAA Active Region 4012). A total of 11 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 428 (NOAA Active Region 4019) and SIDC Sunspot Group 398 (NOAA Active Region 4021) have the most complex magnetic configuration (Beta_Delta). SIDC Sunspot Group 405 (NOAA Active Region 4028) has turned on disk on the east limb and was responsible for most of the C-class flaring over the past 24h. Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely and a small chance for X-class flares.

Éjection de masse coronale

No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.

Vent solaire

In the last 24 hours, Earth was under the influence of the high speed stream (HSS) from the negative polarity coronal hole which crossed the central meridian on March 10. The solar wind speed increased to 560 km/s. The interplanetary magnetic field reached 12 nT and now gradually reduced to 7 nT. The North-South component (Bz) reached minimum value of -9 nT. In the next 24 hours, we expect a gradual transition from fast to slow solar wind.

Géomagnétisme

Geomagnetic conditions were at minor storm levels globally (Kp 5) and active conditions locally (K Bel 4) since mid of March 12 due to a high-speed stream arrival. Unsettled to active conditions are expected in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux remained below the 10 pfu threshold and is expected to remain so over the next days.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux was above the 1000 pfu threshold on March 12, but are currently below the threshold. The greater than 2 MeV electron flux is expected to be high and occasionally above the 1000 pfu threshold 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 : 164, sur la base de 14 stations.

Indices solaires pour 12 Mar 2025

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	160
AK Chambon La Forêt	046
AK Wingst	029
Ap estimé	035
Nombre international de taches solaires estimé	158 - Basé sur 15 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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