Affichage des archives de mercredi, 12 avril 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Apr 12 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Apr 2017	075	010
13 Apr 2017	076	010
14 Apr 2017	077	008

Bulletin

Solar activity was at low levels during the period. The strongest event was a B1.4 flare peaking at 19:45 UT yesterday. This flare was produced by NOAA 2650 (McIntosh: Cao; Mag.Type: Beta). No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels. B-class flaring is expected, with a small chance on an isolated C-class flare. Solar wind speed increased from about 420 km/s to values around 490 km/s (00UT, 12/04), but then decreased again till 450 km/s. The total interplanetary magnetic field (IMF) strength, as recorded by the DSCOVR satellite, has been around 5 nT. Bz fluctuated between -4.5 and +4 nT, being mostly negative. Solar wind parameters are expected to decline further today. The geomagnetic field was at quiet to unsettled levels, Kp NOAA index: 2-3, local K Dourbes index: 1-3. Quiet to unsettled conditions are expected, with a chance on an active episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 020, sur la base de 20 stations.

Indices solaires pour 11 Apr 2017

Nombre de Wolf, observé par Catania	015
Flux solaire à 10 cm	075
AK Chambon La Forêt	023
AK Wingst	015
Ap estimé	014
Nombre international de taches solaires estimé	014 - Basé sur 30 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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