Affichage des archives de vendredi, 21 novembre 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Nov 21 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
21 Nov 2025	130	012
22 Nov 2025	130	017
23 Nov 2025	134	017

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 6 numbered sunspot groups were identified on the disk over the past 24 hours, all having alpha or beta magnetic configuration. The largest flare was a C1.4 flare peaking on November 21 at 05:36 UTC from behind the east limb. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely.

Éjection de masse coronale

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

Vent solaire

Slow solar wind conditions were recorded over the past 24 hours. The interplanetary magnetic field was around 11 nT then at . The Bz reached a minimum value of -5nT. The solar wind velocity was around 450 km/s. Slow solar wind conditions are expected in the next 24 hours.

Géomagnétisme

Geomagnetic activity was globally quiet to unsettled (Locally unsettled to active) 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 measured by GOES 19 was above the 1000 pfu threshold from Nov 20 around 11:50 UTC to 19:15 UTC . Electron flux levels are expected to cross shortly the 1000 pfu threshold over the next 24 hours. The 24-hour electron fluence was at moderate levels and is expected to remain at moderate levels over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 071, sur la base de 13 stations.

Indices solaires pour 20 Nov 2025

Nombre de Wolf, observé par Catania	091
Flux solaire à 10 cm	121
AK Chambon La Forêt	///
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	062 - Basé sur 13 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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