Affichage des archives de vendredi, 20 septembre 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Sep 20 1202 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
20 Sep 2013	109	010
21 Sep 2013	113	007
22 Sep 2013	115	014

Bulletin

There are currently nine numbered sunspot groups on the solar disc, and three of them have beta configuration of the photospheric magnetic field. Three low C-class level flares were reported during last 24 hours and all originated from the same NOAA AR 1850, which just turned from behind the east solar limb. We expect more flaring activity at the C-class level. The M-class flares are possible but not very probable. The solar wind speed is about 480 km/s and slowly decreasing, and the interplanetary magnetic field magnitude is stable amounting about 3 nT. The geomagnetic conditions are at the moment quiet. We expect quiet to active geomagnetic conditions in the following 48 hours due to the arrival of a fast flow (in the morning of September 22), associated with the low-latitude coronal hole in the northern hemisphere.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 062, sur la base de 12 stations.

Indices solaires pour 19 Sep 2013

Nombre de Wolf, observé par Catania	094
Flux solaire à 10 cm	108
AK Chambon La Forêt	019
AK Wingst	012
Ap estimé	013
Nombre international de taches solaires estimé	044 - Basé sur 19 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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