Affichage des archives de dimanche, 27 avril 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Apr 27 1225 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
27 Apr 2014	118	005
28 Apr 2014	116	009
29 Apr 2014	114	005

Bulletin

NOAA 2038 produced the only C flare of the period (C2 peaking at 14:59UT), just before rounding the west limb. Current imagery shows 6 sunspot groups, most having magnetically simple configurations. One region developed overnight in the northwest quadrant, while two other regions rounded the east limb. There are also a few 15-20 degrees long filaments visible near the central meridian and in the southwest quadrant. C-class flares remain possible. Solar wind speed decreased further from around 380 to 350km/s. Bz varied between -4 and +3nT, and became predominantly northward around midnight. The particle stream from a small equatorial coronal hole that passed the central meridian early on 24 April, is expected to arrive at Earth later today or tomorrow. The geomagnetic field has been quiet and is expected to remain so. Locally, a brief active interval is possible from the effect of the coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 057, sur la base de 10 stations.

Indices solaires pour 26 Apr 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	121
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	032 - Basé sur 19 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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