Affichage des archives de mardi, 28 avril 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Apr 28 1230 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
28 Apr 2015	100	014
29 Apr 2015	100	016
30 Apr 2015	100	018

Bulletin

Only three active regions (AR) are visible on the solar disk. Flaring activity was limited to an impulsive C1.9 flare from NOAA AR 2331, peaking at 5:19 UT on April 28. A filament eruption occurred from 2:55 UT, April 28 on near N10E50. Coronagraphic images are not available yet to analyze any associated CME. Further flaring at the C-level is expected. Earth is currently inside a slow solar wind (speed in the range 280-350 km/s). The magnitude of the interplanetary magnetic field (IMF) is stable near 7nT, with a mainly negative Bz and a negative (toward) phi angle. Quiet to unsettled (local K=0 to 3 at Dourbes) geomagnetic conditions were observed and are largely expected to remain so. There is some chance for a few time slots of active (K=4) to minor storm (K=5) conditions, due to an expected flow from a positive polarity coronal hole, on April 29 and 30.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 032, sur la base de 17 stations.

Indices solaires pour 27 Apr 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	108
AK Chambon La Forêt	010
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	035 - Basé sur 25 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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