Affichage des archives de vendredi, 18 décembre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Dec 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 Dec 2020	082	002
19 Dec 2020	082	003
20 Dec 2020	082	003

Bulletin

The Sun has not produced any B flare or higher in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 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 during the past 24 hours, and is expected to remain so in the next 24 hours.

Solar wind speed near Earth as registered by DSCOVR varied between about 265 and 300 km/s in the past 24 hours. The orientation of the Interplanetary Magnetic Field (IMF) was predominantly positive (away from the Sun) and its magnitude varied between about 1 and 8 nT. Bz was never below -5 nT. Nominal solar wind conditions are expected in the next days.

Quiet geomagnetic conditions (K Dourbes between 0 and 1; NOAA Kp between 0 and 1) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on December 18, 19 and 20.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 004, sur la base de 12 stations.

Indices solaires pour 17 Dec 2020

Nombre de Wolf, observé par Catania	012
Flux solaire à 10 cm	082
AK Chambon La Forêt	003
AK Wingst	001
Ap estimé	001
Nombre international de taches solaires estimé	011 - Basé sur 19 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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