Affichage des archives de vendredi, 31 mai 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 May 31 1250 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
31 May 2013	102	012
01 Jun 2013	104	029
02 Jun 2013	104	010

Bulletin

Two C-class flares were observed during the past few hours. A C1.4 flare at 7h57 UT originating from Catania sunspot group 82 (NOAA AR 1756) was a long duration event. This is associated with a rather small limb CME propagating to the South West and based on currently available information it is expected not to be Earth directed. A C1.1 flare at 11h27 UT was originating from Catania sunspot group 88 (NOAA AR 1761). C-class flaring activity is expected for the next 48 hours. The current solar wind speed is at 350 km/s. The interplanetary magnetic field has a magnitude of 5 nT with a mainly negative Bz-component. Geomagnetic conditions are still quiet (local K<3 at Dourbes). The geomagnetic index is expected to increase later today and tomorrow and reach active to minor storm levels (K=4 to 5), due to the effects of a fast speed stream.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 041, sur la base de 20 stations.

Indices solaires pour 30 May 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	104
AK Chambon La Forêt	006
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	052 - Basé sur 13 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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