Affichage des archives de dimanche, 21 avril 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Apr 21 1248 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
21 Apr 2013	107	003
22 Apr 2013	108	006
23 Apr 2013	106	007

Bulletin

Seven sunspot groups were reported by Catania today. During past 24 hours fifteen low C-class flares were reported and they all originated from the Catania sunspot group 51 (NOAA AR 1726). This fast growing sunspot group has at the moment beta-gama configuration of its photosperic magnetic field and we expect that it will produce more C-class flares and also possibly M-class flares. The interplanetary magnetic field magnitude is about 7 nT. The Earth is currently under the influence of a slow solar wind with the speed of about 270 km/s. The low-latitude coronal hole in the southern hemisphere has reached the central meridian and we expect arrival of the fast solar wind late on April 24. We expect quiet to possibly active geomagnetic conditions in the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 061, sur la base de 08 stations.

Indices solaires pour 20 Apr 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	105
AK Chambon La Forêt	007
AK Wingst	003
Ap estimé	003
Nombre international de taches solaires estimé	059 - Basé sur 24 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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