Affichage des archives de vendredi, 19 novembre 2021

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2021 Nov 19 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
19 Nov 2021	080	003
20 Nov 2021	081	004
21 Nov 2021	082	006

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 5%.

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 is expected to stay at nominal 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 further decreased from about 545 to 450 km/s in the past 24 hours. The Interplanetary Magnetic Field near Earth (IMF) was oriented towards the Sun and its magnitude varied between about 2 and 4 nT, which implies Bz was never below -5 nT. Nominal solar wind conditions are expected in the next 24 hours. A high speed stream from a negative polarity coronal hole is expected to arrive near Earth late on November 21 or on November 22.

Quiet geomagnetic conditions (K-BEL between 1 and 2; NOAA Kp = 1) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K-BEL < 4) are expected on November 19 and 20 and in the first half of November 21. Active to minor storm intervals (K-BEL = 4-5) are possible in the second half of November 21, upon the expected arrival of a high speed stream from a negative polarity coronal hole, late on November 21 or early on November 22.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 021, sur la base de 11 stations.

Indices solaires pour 18 Nov 2021

Nombre de Wolf, observé par Catania	023
Flux solaire à 10 cm	082
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	022 - Basé sur 24 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

<< Aller à l'aperçu quotidien