Affichage des archives de samedi, 12 avril 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Apr 12 1147 UTC

Prévisions SIDC

Éruptions solaires

Active (M-class flares expected, probability >=50%)

Géomagnétisme

Major magstorm expected (A>=50 or K>=6)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Apr 2014	140	048
13 Apr 2014	145	020
14 Apr 2014	150	011

Bulletin

Four C-class flares were observed originating from Catania sunspot region 24 (NOAA AR 2035), the largest one being a C5.3 peaking at 15:01 UT, April 11. The C5.3 flare was associated with an Eastward directed CME (first measurement of LASCO/C2 at 14:48 UT) with angular width of about 100 degrees and speed of 568 km/s as estimated by CACTus. At most a shock could arrive at Earth around 12h UT on April 14. More C-class flares are expected during the next 48 hours, especially from Catania sunspot region 24. Also an isolated M-class flare is possible. ACE observed an increase in the magnitude of the IMF from 7 to 11 nT, with a negative Bz currently reaching -9 nT. This resulted in active to minor storm magnitude conditions during the first half the UT day (local K=4 at Dourbes and even NOAA Kp=5). Solar wind speed has gradually declined to 350 km/s. Unsettled to maximally major storm conditions are expected due to currently negative Bz and the arrival of the CH high speed stream.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 053, sur la base de 10 stations.

Indices solaires pour 11 Apr 2014

Nombre de Wolf, observé par Catania	083
Flux solaire à 10 cm	138
AK Chambon La Forêt	031
AK Wingst	011
Ap estimé	010
Nombre international de taches solaires estimé	047 - Basé sur 22 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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