Affichage des archives de lundi, 8 avril 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Apr 08 1134 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
08 Apr 2013	141	004
09 Apr 2013	144	005
10 Apr 2013	145	003

Bulletin

Three out of nine active regions reported by NOAA today have beta-gamma configuration of the photospheric magnetic field (NOAA ARs 1713, 1718, and 1719). So, despite no C-class flares today, we expect flaring activity on the C-level, with an M-class flare possible but not very likely. An eruption in the NOAA AR 1714 (Catania sunspot group 34) was detected around 02:00 UT on April 8, accompanied by a local soft X-ray flux peak at 01:44 UT at C1.1 level (no flare was reported). Coronal dimmings and a post-eruption arcade observed by SDO/AIA indicate the eruption of a CME. However, SOHO/LASCO did not detect any CME in association with this event, and STEREO coronagraphs have a data gap. Due to presumed weakness of the event (below the detectability threshold of LASCO), any geomagnetic consequences are unlikely. The Earth is currently inside a slow (around 350 km/s) solar wind flow with weak to average (3-4 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 090, sur la base de 09 stations.

Indices solaires pour 7 Apr 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	138
AK Chambon La Forêt	007
AK Wingst	005
Ap estimé	005
Nombre international de taches solaires estimé	082 - Basé sur 21 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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