Affichage des archives de jeudi, 2 avril 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Apr 02 1239 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (C-class flares expected, probability >=50%)

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
02 Apr 2015	122	012
03 Apr 2015	121	028
04 Apr 2015	124	010

Bulletin

Five sunspot groups were reported by NOAA today. However, the only C-class flare observed during the past 24 hours (C1.3 flare peaking at 05:34 UT today) occurred in the active region just behind the east solar limb. More C-class flares are expected from this active region. The C1.3 flare was associated with a partial halo CME (angular width around 150 degrees). It is a far side limb event, so it will not arrive at the Earth and will have no geomagnetic consequences. The Earth is currently inside a slow solar wind flow following the passage through the ICME on March 31 - April 1. The interplanetary magnetic field magnitude is still elevated (around 7-8 nT), but a relatively low solar wind speed (around 450 km/s) makes sure that the geomagnetic situation will most probably remain on the quiet to unsettled level in the coming hours. Later today we expect the arrival of a fast flow from a trans-equatorial coronal hole that reached the solar central meridian late on March 30, possibly resulting in a geomagnetic disturbance up to the minor storm level (K = 5).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 025, sur la base de 14 stations.

Indices solaires pour 01 Apr 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	124
AK Chambon La Forêt	015
AK Wingst	009
Ap estimé	010
Nombre international de taches solaires estimé	028 - Basé sur 20 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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