Affichage des archives de mercredi, 4 octobre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Oct 04 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
04 Oct 2017	086	009
05 Oct 2017	085	015
06 Oct 2017	085	012

Bulletin

Solar activity was at very low levels. NOAA 2683 (Catania 57) gained some small opposite polarity sunspots south of the main spot, and was the source of 3 low-level B-class flares. NOAA 2682 (Catania 56) was quiet, showing a long filament to the east and north of the main spot. 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 a small chance on a C-class flare.

A sector boundary crossing (SBC) was observed in the solar wind during the first half of 03 October, during which the interplanetary magnetic field changed its direction from "away" to "towards" the Sun. During the last 24 hours, solar wind speed declined gradually from 410 to 370 km/s (DSCOVR). Bz fluctuated between -2 and +4 nT.

The geomagnetic field was mostly quiet, with Kp at unsettled levels during the 03-06UT interval. Quiet to unsettled geomagnetic conditions are expected to continue. The arrival of the particle stream associated with a small negative equatorial coronal hole is expected late on 04 or on 05 October, and may increase the likelihood on an active geomagnetic episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 12 stations.

Indices solaires pour 03 Oct 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	086
AK Chambon La Forêt	009
AK Wingst	007
Ap estimé	007
Nombre international de taches solaires estimé	028 - Basé sur 25 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

<< Aller à l'aperçu quotidien