Affichage des archives de lundi, 14 septembre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Sep 14 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
14 Sep 2020	069	013
15 Sep 2020	069	012
16 Sep 2020	069	012

Bulletin

The sun is spotless and no B or brighter flares were observed in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 1%.

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 exceeded the 1000 pfu alert threshold, with a maximum of 1730 pfu at 21:50 UT on September 13, and has meanwhile recovered to nominal levels. The electron flux is expected to be at nominal levels, with a small chance to reach moderate levels.

Solar wind speed near Earth as registered by DSCOVR increased from about 315 to 340 km/s until 8:45 UT on September 14, when it increased further to current values around 410 km/s. The Interplanetary Magnetic Field (IMF) was oriented predominantly away from the Sun until 19:35 UT on September 13, when it switched to predominantly towards the Sun. The IMF magnitude varied between about 0 and 11 nT, with current values of around 6 nT. Bz was below -5 nT for several intervals, with a lowest value slightly below -8 nT. Quiet to slightly enhanced solar wind conditions are expected in the next 24 hours.

Quiet to unsettled geomagnetic conditions (K Dourbes between 2 and 3; NOAA Kp between 0 and 3) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on September 14, 15 and 16, with a chance for isolated active intervals (K Dourbes = 4).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 002, sur la base de 24 stations.

Indices solaires pour 13 Sep 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	020
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 26 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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