Affichage des archives de dimanche, 8 octobre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Oct 08 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
08 Oct 2017	077	003
09 Oct 2017	075	003
10 Oct 2017	074	006

Bulletin

Solar activity was at very low levels. NOAA 2683 (Catania 57) had rotated over the west limb by the end of the period. It was the source of a B5 flare peaking on 08 October at 06:47UT. A small bipolar sunspot region emerged near N15W35. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Quiet flaring conditions are expected, with still a slight chance on an isolated C-class flare.

Solar wind speed varied between 400 and 460 km/s (DSCOVR). Bz fluctuated between -5 and +6 nT, being mostly positive after 04UT. The interplanetary magnetic field was mostly directed towards the Sun. The extension of a positive polar CH started its transit of the Central Meridian early on 07 October and may influence the earth environment around 10-11 October.

The geomagnetic field was at quiet levels, with unsettled levels reached in Dourbes at the end of the period. Mostly quiet geomagnetic conditions are expected, with a chance on an isolated unsettled interval.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 14 stations.

Indices solaires pour 07 Oct 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	080
AK Chambon La Forêt	009
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	013 - 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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