Affichage des archives de samedi, 29 octobre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Oct 29 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
29 Oct 2016	079	029
30 Oct 2016	081	018
31 Oct 2016	083	008

Bulletin

Two small B2 flares were observed from an unnumbered sunspot region near N10W70 between 21 and 24UT. This region is currently decaying. NOAA 2603 was quiet and rotated over the west limb, while NOAA 2604 (Catania 50) showed some activity around 01:45UT. Old active region NOAA 2599, source of the 25 October CME on the Sun's farside, is expected to rotate over the southeast limb during the next 24 hours. No earth-directed coronal mass ejections (CMEs) were observed.

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

Earth remained under the influence of the high speed stream (HSS) from the huge coronal hole (CH). Solar wind speed started the period near 670 km/s, reached a minimum around 23UT near 550 km/s, before intensifying again to near 700 km/s around 08:30UT. The current solar wind speed is near 600 km/s (DSCOVR). Bz ranged mostly between -4 and +5 nT, except for a sustained negative period between midnight and 06UT with dips to -9 nT. The interplanetary magnetic field (IMF) was directed away from the Sun (positive). Kp ranged from unsettled conditions to minor geomagnetic storming, while the hourly K Dourbes ranged from quiet conditions to minor storming.

The geo-environment is expected to remain under the influence of the CH HSS for most of the period. Quiet to active conditions are expected, with still a good but waning chance on an isolated minor storming episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 16 stations.

Indices solaires pour 28 Oct 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	079
AK Chambon La Forêt	030
AK Wingst	019
Ap estimé	019
Nombre international de taches solaires estimé	036 - Basé sur 19 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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