Affichage des archives de jeudi, 10 septembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Sep 10 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
10 Sep 2015	081	014
11 Sep 2015	080	020
12 Sep 2015	078	010

Bulletin

Only four small sunspot groups are presently visible on the solar disc. The flaring activity is on the B-class level and we expect it to remain so in the following 24 hours. No Earth directed CMEs were observed during last 24 hours.

The solar wind speed is currently 430 km/s, and the interplanetary magnetic field magnitude is about 9 nT. The long interval of the negative value of the Bz component (down to -8 nT) and at that moment still high solar wind speed (about 430 km/s) induced geomagnetic storm conditions lasting from about 18 UT yesterday until 03 UT today, NOAA reported Kp=6 and local station Dourbes reported K=5. The fast flow, associated with the elongated equatorial coronal hole (20S to 20N) which crossed central meridian in the morning of September 08, is expected late this evening or tomorrow morning. Additionally, the fast flow from the low latitude extension of the northern polar coronal hole which crossed the central meridian yesterday morning is expected late on September 11 or in the morning of September 12. Currently the geomagnetic conditions are quiet and we expected these conditions to persist in the coming hours. However, arrival of the fast flow can induced active to geomagnetic storm conditions later today and tomorrow morning.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 044, sur la base de 19 stations.

Indices solaires pour 09 Sep 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	082
AK Chambon La Forêt	064
AK Wingst	051
Ap estimé	053
Nombre international de taches solaires estimé	046 - Basé sur 25 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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