Affichage des archives de lundi, 12 août 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Aug 12 1221 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Aug 2013	114	008
13 Aug 2013	118	007
14 Aug 2013	120	007

Bulletin

NOAA AR 1817 is expected to be the main player in the coming 48 hours with risks of M class flares. It evolved rather quickly in the past 24 hours, and it is now a complex and elongated sunspot group. The central part shows a wide penumbra making the link between two opposite polarity sunspots. Strong C flares occurred in this region on August 11 (C6.7 at 2131UT and C8.4 at 2158 UT peak time). A M1.5 flare occurred in this region on August 12, 1041 UT peak time. Indirect signatures of CMEs were observed, on disk, with EUV imagers, but data gaps in coronagraphic data during these flares, do not allow to confirm this. We expect active flaring conditions in the next 48 hours. C flares are possible for NOAA AR 1818. We foresee mostly quiet conditions in terms of geomagnetic activity for the next 48 hours. Current interplanetary conditions, as measured by ACE are quiet.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 057, sur la base de 13 stations.

Indices solaires pour 11 Aug 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	110
AK Chambon La Forêt	///
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	054 - 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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