Affichage des archives de samedi, 22 novembre 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Nov 22 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
22 Nov 2025	125	006
23 Nov 2025	125	007
24 Nov 2025	130	007

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, all having alpha or beta magnetic configuration. SIDC Sunspot Group 693 (NOAA Active Region 4284), turning towards the west limb, and SIDC Sunspot Group 705 (NOAA Active Region 4290), turning on disk from the east limb, were the most active regions responsible for the majority of the C-class flaring. The largest flare was a C4.8 flare (SIDC Flare 6159) peaking on November 22 at 11:46 UTC from SIDC Sunspot Group 705 (NOAA Active Region 4290). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely and a small 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

A elongated positive polarity coronal hole, mainly mid- latitude but with an equatorial extension, is crossing the central meridian. A high-speed stream from this coronal hole may enhance the solar wind environment near Earth on November 25.

Vent solaire

Slow solar wind conditions were recorded over the past 24 hours. The interplanetary magnetic field was around 7 nT. The Bz reached a minimum value of - 2nT. The solar wind velocity was around 430 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 : 058, sur la base de 10 stations.

Indices solaires pour 21 Nov 2025

Nombre de Wolf, observé par Catania	074
Flux solaire à 10 cm	121
AK Chambon La Forêt	///
AK Wingst	008
Ap estimé	006
Nombre international de taches solaires estimé	069 - Basé sur 21 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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