Affichage des archives de vendredi, 5 septembre 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Sep 05 1248 UTC

Prévisions SIDC

Éruptions solaires

Active (M-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Warning condition (activity levels expected to increase, but no numeric forecast given)

	Flux de 10 cm	Ap
05 Sep 2014	150	007
06 Sep 2014	155	003
07 Sep 2014	160	003

Bulletin

Eight C-class flares were produced, mainly by Catania sunspot group 45, 44 and 40 (NOAA AR 2157, 2155 and 2152 respectively). The strongest flare was a C6.7 flare, peaking at 6:54 UT on September 5, originating from Catania group 45. A partial halo CME (apparent width of about 120 degrees), with first measurement at 7:12 UT in SOHO/LASCO C2, was associated with this flare. The CME is travelling East of the Sun-Earth line with a projected plane-of-the-sky speed of 650 km/s and is not expected to arrive at Earth. We expect flaring activity up to the M-level, in particular from the Catania groups 44 and 45 and the former NOAA AR 2139. The solar proton flux currently remains stable below the SEP event threshold. We maintain the warning condition for a proton event. The Earth is currently inside a slow (around 370 km/s) solar wind flow with average (around 5 nT) interplanetary magnetic field magnitude. The geomagnetic conditions are quiet and are expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 075, sur la base de 09 stations.

Indices solaires pour 04 Sep 2014

Nombre de Wolf, observé par Catania	114
Flux solaire à 10 cm	146
AK Chambon La Forêt	010
AK Wingst	007
Ap estimé	008
Nombre international de taches solaires estimé	085 - Basé sur 18 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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