Affichage des archives de mercredi, 17 avril 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Apr 17 1234 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
17 Apr 2013	108	006
18 Apr 2013	107	006
19 Apr 2013	106	009

Bulletin

Six sunspot groups were reported by Catania today. The flaring activity was at the low C-class level, and the strongest flare reported was the long duration C3.5 flare peaking at 21:32 UT on April 16. The flare originated from the Catania sunspot group 43 (NOAA AR 1719) situated at that moment close to the west solar limb. The flare was associated with the coronal dimming. The presence of the coronal dimming gives indication that the flare had an associated CME. However, this cannot be confirmed due to the data gap in SOHO/LASCO and STEREO observations. The flaring activity at the C-class level is probable and the M-class flares are still possible but unlikely. The Earth is inside a slow solar wind with a speed of about 350 km/s. The interplanetary magnetic field magnitude is about 4 nT. The Bz component of the interplanetary magnetic field is fluctuating with the occasional intervals of its negative values (up to -5 nT). The geomagnetic conditions are quiet and expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 062, sur la base de 08 stations.

Indices solaires pour 16 Apr 2013

Nombre de Wolf, observé par Catania	109
Flux solaire à 10 cm	113
AK Chambon La Forêt	010
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	067 - Basé sur 20 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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