Affichage des archives de lundi, 7 décembre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Dec 07 1230 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
07 Dec 2020	091	007
08 Dec 2020	091	007
09 Dec 2020	091	013

Bulletin

Solar activity was low, with only a single C-class flare peaking at 13:27 UT on 6 December, at C1.6 level from NOAA AR 2790, this AR decayed from beta to alpha magnetic field configuration. The other region visible is NOAA AR 2791, of beta type. Further isolated C flaring is possible in the next 24 h.

No new Earth-directed CMEs have been observed in coronagraph data.

An elongated equatorial coronal hole of negative polarity crossed the central meridian yesterday and expected to influence Solar wind conditions from December 9 onwards.

The greater than 10 MeV proton flux is at background levels and is expected to remain at background levels. The greater than 2MeV electron flux did not exceed the 1000 pfu alert threshold. The 24h electron fluence was at moderate levels and is expected to remain at normal to moderate levels over the next days.

Solar wind speed was around 400 km/s and the interplanetary magnetic field mostly around 5 nT. Bz never went below -5 nT. The magnetic field phi angle has oriented away from the Sun (positive). Slow solar wind conditions are expected over the next days until December 9 when we are expected to see the onset of a high speed stream from the equatorial negative polarity coronal hole.

Geomagnetic conditions were quiet (local K Dourbes 0-2 and NOAA Kp 0-2). Geomagnetic conditions are expected to be quiet.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 021, sur la base de 09 stations.

Indices solaires pour 06 Dec 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	091
AK Chambon La Forêt	011
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	023 - 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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