Affichage des archives de mardi, 8 mai 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 May 08 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
08 May 2018	069	013
09 May 2018	070	008
10 May 2018	070	005

Bulletin

Solar activity was at very low levels. Active region NOAA 2708 is decaying fast and is barely visible. A new sunspot region has rounded the east limb (Catania 81; Location: N06E71), but it is small and -so far- inactive. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to be at very low levels, with a slight chance on an isolated C-class flare.

Earth is under the influence of the high speed stream (HSS) from an elongated negative polarity equatorial coronal hole (CH). Solar wind speed varied in a slightly declining band between 700 and 560 km/s (DSCOVR). Bz varied between -8 and +7 nT. The interplanetary magnetic field was mostly directed towards the Sun. Geomagnetic activity was at quiet to unsettled levels, with an isolated active episode recorded by Dourbes during the 15-18UT interval.

Quiet to unsettled geomagnetic conditions are expected, with a chance on an isolated active interval.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 021, sur la base de 22 stations.

Indices solaires pour 07 May 2018

Nombre de Wolf, observé par Catania	014
Flux solaire à 10 cm	070
AK Chambon La Forêt	024
AK Wingst	020
Ap estimé	021
Nombre international de taches solaires estimé	016 - 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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