Affichage des archives de samedi, 11 avril 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Apr 11 1230 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (C-class flares expected, probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
11 Apr 2015	120	020
12 Apr 2015	123	007
13 Apr 2015	126	007

Bulletin

Beta-delta region NOAA AR 2320 released two C flares and a new region on the East limb each released one C flare during the past 24 hours. The strongest flare was the C4.7 flare produced by the new region, which peaked at 2:41 UT on April 11. In the next 24 hours, more C flaring is expected, with a chance for an M flare. During the past 24 hours, solar wind speed decreased from about 410 km/s to 360 km/s while the Interplanetary Magnetic Field (IMF) magnitude decreased from about 20 to 5 nT. Bz reached -12 nT at short intervals and stayed below -5 nT from about 13:15 to 8:15 UT. The Phi angle switched from a positive (away) towards a negative (towards) sector in the first half of April 11. Over the past 24 hours, geomagnetic conditions have been quiet to active (K Dourbes between 2 and 4; NOAA Kp between 2 and 4) as a response to the elevated solar wind speed and IMF magnitude. Quiet to active geomagnetic levels are expected to continue for the rest of April 11, while quiet levels (K Dourbes < 4) are predicted for April 12 and 13.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 031, sur la base de 15 stations.

Indices solaires pour 10 Apr 2015

Nombre de Wolf, observé par Catania	071
Flux solaire à 10 cm	115
AK Chambon La Forêt	034
AK Wingst	031
Ap estimé	030
Nombre international de taches solaires estimé	031 - Basé sur 28 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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