Affichage des archives de samedi, 20 juillet 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Jul 20 1408 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 Jul 2013	114	015
21 Jul 2013	113	015
22 Jul 2013	113	012

Bulletin

The only C-class flare reported during the last 24 hours was C2.1 flare originating from the NOAA AR 1793. This active region currently has beta- gamma configuration of the photosperic magnetic field and the potential to produce C-class and possibly M-class flares. The newly arrived data showed that the CME on July 18 associated with the prominence eruption on the east solar limb, is most probably not Earth-directed. The Earth is still inside the fast speed stream due to the low-latitude coronal hole in the northern hemisphere. At the moment the solar wind speed is 530 km/s and the interplanetary magnetic field (IMF) is rather stable with the magnitude of about 2 nT. We expect unsettled to active geomagnetic conditions due to the currently ongoing influence of the fast stream. The arrival of the fast flow from the low-latitude coronal hole (also crossing the equator) in the southern hemisphere, which just reached the central meridian is expected on July 23.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 037, sur la base de 12 stations.

Indices solaires pour 19 Jul 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	114
AK Chambon La Forêt	023
AK Wingst	020
Ap estimé	019
Nombre international de taches solaires estimé	058 - 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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