Affichage des archives de jeudi, 19 février 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Feb 19 1233 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
19 Feb 2015	125	010
20 Feb 2015	130	006
21 Feb 2015	140	008

Bulletin

A few new regions developed themselves during the past period. NOAA active regions (AR) 2287, 2288 and 2290 are the most interesting ones. NOAA ARs 2287 and 2288 evolved to beta regions, while NOAA ARs 2286, 2289, 2290 are alpha regions. Flaring activity slightly increased with three C-class flares. The strongest flare was a C3.5 flare, originating from the northern part of NOAA AR 2282. More C-class flares are expected, mainly from NOAA 2282, 2287, 2288 and 2290. No Earth-bound CMEs were observed. The solar wind was at nominal levels, with the magnitude of the interplanetary magnetic field between 3 and 5 nT and a fluctuating Bz component. The solar wind speed slightly decreased from 470 to about 400 km/s. Geomagnetic conditions were quiet to unsettled (K=1 to 3), at the global and local level (Dourbes), which is expected to continue for the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 063, sur la base de 08 stations.

Indices solaires pour 18 Feb 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	121
AK Chambon La Forêt	020
AK Wingst	022
Ap estimé	020
Nombre international de taches solaires estimé	059 - Basé sur 23 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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