Affichage des archives de dimanche, 28 septembre 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Sep 28 1235 UTC

Prévisions SIDC

Éruptions solaires

Active (M-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Warning condition (activity levels expected to increase, but no numeric forecast given)

	Flux de 10 cm	Ap
28 Sep 2014	188	010
29 Sep 2014	193	012
30 Sep 2014	196	007

Bulletin

Solar activity was moderate with an M5.1 flare from NOAA AR 2173 peaking at 2:58 UT. It was associated with type II radio bursts and a dimming. Coronagraph data however seen to indicate just a narrow south- eastward directed CME. AR 2172 and 2173 produced a further number of C flares. AR 2172, 2173, and 2175 remain active and are the most likely sources on disc. New flaring activity at M level is likely. With the main active regions on disc approaching moving to the west the chances for a proton event are increasing. After touching minima of below 380 km/s in the first half of the reporting period, solar wind speed picked up slightly again to around 420 km/s presently. Total magnetic field was mainly in the 5-7 nT range with Bz variable mainly in the +-4nT range with a period of negative Bz peaking below -5nT around 10:00 UT. Geomagnetic conditions were accordingly quiet with unsettled conditions late this morning. Quiet to unsettled conditions are expected to continue with some active periods still possible in the first 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 129, sur la base de 11 stations.

Indices solaires pour 27 Sep 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	181
AK Chambon La Forêt	013
AK Wingst	016
Ap estimé	017
Nombre international de taches solaires estimé	129 - Basé sur 18 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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