Affichage des archives de dimanche, 5 avril 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Apr 05 1230 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
05 Apr 2015	122	007
06 Apr 2015	121	010
07 Apr 2015	123	009

Bulletin

Four active regions were reported by NOAA today. However, the two strongest flares of the past 24 hours did not occur in any of them. The C1.9 flare peaking at 03:36 UT today took place behind the north-west limb. The C3.8 flare peaking at 00:07 UT today was associated with a filament eruption in the south-east quadrant (to the south of NOAA ARs 2319 and 2320). A partial halo CME was associated with this flare. It first appeared in the SOHO/LASCO C2 field of view at 23:36 UT on April 4, had the angular width of at least 230 degrees and projected plane-of-the-sky speed around 760 km/s. SDO/AIA data show that the CME was also accompanied by coronal dimmings and a post-eruption arcade. The bulk of the CME material is directed eastward of the Sun-Earth line, so we expect only a glancing blow from this CME (probably the CME-driven shock) late on April 7 or early on April 8. More C-class flares are expected, especially in the NOAA AR 2320. The Earth is currently inside a solar wind flow with intermediate speed (around 520 km/s) and the interplanetary magnetic field magnitude of around 6 nT. The geomagnetic conditions are quiet to unsettled (K < 4) and are expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 042, sur la base de 12 stations.

Indices solaires pour 04 Apr 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	122
AK Chambon La Forêt	021
AK Wingst	014
Ap estimé	013
Nombre international de taches solaires estimé	042 - Basé sur 16 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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