Affichage des archives de vendredi, 7 août 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Aug 07 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
07 Aug 2015	125	019
08 Aug 2015	130	007
09 Aug 2015	135	007

Bulletin

The Sun produced four C-class flares during the past 24 hours, the largest one being a C4.8 peaking at 3:57 UT. All flares originated from NOAA active region 2396. A new unnumbered region has turned to the visible side, which adds the total number of active regions up to six. No Earth- directed CMEs were observed. More flares at the C-level are expected.

Earth is under influence of a flow at moderate speed, emanating from an equatorial coronal hole. Solar wind speed reached values of maximally 650 km/s, but declined to current values near 500 km/s. The magnitude of the interplanetary magnetic field (IMF) obtained values in the range of 5 to 11 nT with mainly negative Bz. At 9 UT, this resulted in geomagnetic active (K=4) conditions at the local level (Dourbes) and even minor storm conditions at the planetary level (estimated NOAA Kp=5). A few further time slots of active to minor storm conditions are possible before returning to quiet to unsettled (K=0-3) levels.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 111, sur la base de 27 stations.

Indices solaires pour 06 Aug 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	122
AK Chambon La Forêt	019
AK Wingst	016
Ap estimé	015
Nombre international de taches solaires estimé	103 - Basé sur 38 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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