Affichage des archives de mardi, 29 avril 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Apr 29 1222 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
29 Apr 2014	122	011
30 Apr 2014	125	006
01 May 2014	125	005

Bulletin

Five sunspot regions are visible at the front side of the solar disk. Catania sunspot group 34 (NOAA AR 2049) showed some growth. All other groups were stable. One C3.4 flare was measured by GOES (peak time 15:26 UT on 28 April), originating from Catania sunspot group 31 (NOAA AR 2048). More C-class flares are possible during the next 48 hours. No Earth- directed CMEs were observed. Solar wind speed has declined to only 280 km/s. The magnitude of the interplanetary magnetic field is currently lower than 5 nT. Geomagnetic conditions were quiet and are expected to remain as such. An isolated time slot of active conditions is still possible at arrival of a high speed stream related to the coronal hole that passed the central meridian early on 24 April.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 052, sur la base de 11 stations.

Indices solaires pour 28 Apr 2014

Nombre de Wolf, observé par Catania	093
Flux solaire à 10 cm	121
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	007
Nombre international de taches solaires estimé	058 - Basé sur 14 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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