Affichage des archives de mardi, 8 avril 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Apr 08 1253 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (C-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
08 Apr 2014	140	010
09 Apr 2014	140	011
10 Apr 2014	140	007

Bulletin

Since our last bulletin, three C-class flares were produced. They all originated from Catania sunspot group 8 (NOAA AR 1926). The GOES X-ray flux background was at B-class level. A new region emerged near S03E30. Eruptive flaring activity is expected for the next 48 hours with a slight chance for M-class flares. No Earth bounded CMEs were observed. Solar wind observations from ACE showed an increase of the solar wind speed at 17h UT of April 7 from 360 to 480 km/s and then a decline to 400 km/s. The magnitude of the interplanetary magnetic field varied between 1 and 11 nT, with a Bz component fluctuating between -10 and 6 nT. The periods with a negative Bz resulted in unsettled to active magnetic conditions (both local K at Dourbes and NOAA planetary Kp). So far, there were no clear signatures of arrival of a shock related to the CME of April 4, but it is still possible in the next few hours. Unsettled conditions are expected for the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 085, sur la base de 20 stations.

Indices solaires pour 07 Apr 2014

Nombre de Wolf, observé par Catania	131
Flux solaire à 10 cm	140
AK Chambon La Forêt	014
AK Wingst	011
Ap estimé	010
Nombre international de taches solaires estimé	082 - Basé sur 24 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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