Affichage des archives de jeudi, 6 avril 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Apr 06 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
06 Apr 2017	083	004
07 Apr 2017	081	005
08 Apr 2017	079	005

Bulletin

Solar activity was at low levels during the period. The strongest event was a C1.1 flare peaking at 10:26UT. This flare was produced by decaying NOAA 2645. This region still has magnetic mixing in its trailing portion. The 10.7cm radio flux dropped from 94 sfu on 4 April to 85 sfu on 5 April. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

C-class flaring is expected, with a small chance on an isolated M-class flare.

Earth environment was under the influence of a moderate speed stream from a negative coronal hole. Solar wind speed gradually increased from 400 km/s at noon to 500 km/s by midnight, and has been steady since. Bz fluctuated between -7 and +4 nT. The interplanetary magnetic field was mostly directed towards the Sun.

The geomagnetic field was at quiet to unsettled levels, with an active episode during the 21-24UT interval. Quiet to unsettled conditions are expected, with a chance on an active episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 037, sur la base de 18 stations.

Indices solaires pour 05 Apr 2017

Nombre de Wolf, observé par Catania	054
Flux solaire à 10 cm	085
AK Chambon La Forêt	017
AK Wingst	012
Ap estimé	011
Nombre international de taches solaires estimé	052 - Basé sur 32 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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