Affichage des archives de mardi, 12 avril 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Apr 12 1242 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Apr 2016	117	014
13 Apr 2016	119	027
14 Apr 2016	121	025

Bulletin

Four C flares were released by NOAA AR 2529 in the past 24 hours. The brightest one was a C1.8 flare which peaked at 07:51 UT on April 12. More C flares (probability 75%) are expected in the next 24 hours, with a slight chance (probability 10%) for an M flare, especially from AR 2529. CACTUS detected a partial halo CME at 03:24 on April 12. Close inspection of EUVI A imagery revealed that this CME was associated to a backside event, and will not be geoeffective. Solar wind speed varied between about 340 and 470 km/s in the past 24 hours, while the magnitude of the Interplanetary Magnetic Field ranged between 1 and 12 nT. Over the past 24 hours, geomagnetic conditions have been quiet to unsettled (K Dourbes between 1 and 3; NOAA Kp between 1 and 3). Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on most of April 12. Late on April 12, and on April 13 and 14, the expected arrival of a high speed stream associated with a negative equatorial coronal hole may cause active (K Dourbes = 4) to moderate storm (K Dourbes = 6) conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 038, sur la base de 26 stations.

Indices solaires pour 11 Apr 2016

Nombre de Wolf, observé par Catania	044
Flux solaire à 10 cm	117
AK Chambon La Forêt	011
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	042 - Basé sur 29 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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