Affichage des archives de dimanche, 23 novembre 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Nov 23 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
23 Nov 2025	125	011
24 Nov 2025	130	007
25 Nov 2025	130	015

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. A total of 7 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 706 (NOAA Active Region 4291) currently located at S14E65 has a Beta-Gamma magnetic configuration and was responsible for the majority of the C-class flaring over the past 24 hours. The largest flare was a C6.3 flare (SIDC Flare 6173) peaking on November 22 at 19:00 UTC, which was produced by SIDC Sunspot Group 706 (NOAA Active Region 4291). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Éjection de masse coronale

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

Trous coronaux

SIDC Coronal Hole 138 (mid latitude with equatorial extension, positive polarity) continues to cross the central meridian. A high-speed stream from this coronal hole may enhance the solar wind environment near Earth on November 25. SIDC Coronal Hole 128 (equatorial coronal hole with a positive polarity) first reached the central meridian on November 23. A high-speed stream from this coronal hole may enhance the solar wind environment near Earth on November 26.

Vent solaire

Slow solar wind conditions were recorded over the past 24 hours. The interplanetary magnetic field was around 8 nT. The Bz reached a minimum value of - 7nT. The solar wind velocity was around 420 km/s. Slow solar wind conditions are expected in the next 24 hours.

Géomagnétisme

Geomagnetic activity was globally and locally quiet to unsettled over the past 24 hours. Geomagnetic conditions are expected to be quiet to unsettled in the next 24h.

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 remained below the 1000 pfu alert threshold, and is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 079, sur la base de 07 stations.

Indices solaires pour 22 Nov 2025

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	119
AK Chambon La Forêt	014
AK Wingst	008
Ap estimé	006
Nombre international de taches solaires estimé	062 - Basé sur 22 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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