Affichage des archives de lundi, 28 avril 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Apr 28 1232 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 2014	120	014
29 Apr 2014	124	008
30 Apr 2014	124	005

Bulletin

Six sunspot regions are visible at the front side of the solar disk. All have a simple alpha or beta magnetic configuration. The background of the GOES Xray flux is at B-class level and no noteworthy flares were measured. A weak CME erupted towards the north, first visible in LASCO/C2 at 5:36 UT on 28 April. It can hardly be called a partial halo CME and does not seem to be Earth directed. C-class flaring activity can be expected for the next 48 hours. Solar wind speed is relatively stable with values between 300 to 350km/s. The magnitude of the interplanetary magnetic field was maximally 5 nT with a mainly negative Bz. Geomagnetic conditions were unsettled and are expected to remain as such. An isolated time slot of active conditions is 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 : 057, sur la base de 10 stations.

Indices solaires pour 27 Apr 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	118
AK Chambon La Forêt	009
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	057 - Basé sur 21 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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