Affichage des archives de jeudi, 18 novembre 2021

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2021 Nov 18 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
18 Nov 2021	079	009
19 Nov 2021	078	007
20 Nov 2021	078	007

Bulletin

The Sun produced no C flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at 15%. A filament eruption near 10E45S – 10W35S was observed in SDO/AIA 30.4 nm imagery around 18h UT on November 17.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron flux was at nominal levels in the past 24 hours, and may rise to moderate levels in the next 24 hours. The greater than 2 MeV electron fluence was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed as registered by DSCOVR decreased from about 580 to 545 km/s in the past 24 hours. The Interplanetary Magnetic Field near Earth (IMF) was predominantly oriented towards the Sun and its magnitude varied between about 0 and 6 nT. Bz was never below -5 nT. A gradual return towards nominal levels is expected in the next 24 hours.

Quiet to unsettled geomagnetic conditions (K-BEL between 1 and 3; NOAA Kp between 1 and 3) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K-BEL < 4) are expected on November 18, 19 and 20, with a chance for active intervals (K-BEL = 4) on November 18.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 021, sur la base de 17 stations.

Indices solaires pour 17 Nov 2021

Nombre de Wolf, observé par Catania	034
Flux solaire à 10 cm	079
AK Chambon La Forêt	016
AK Wingst	014
Ap estimé	013
Nombre international de taches solaires estimé	028 - Basé sur 16 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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