Affichage des archives de lundi, 12 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 12 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Oct 2015	089	016
13 Oct 2015	093	034
14 Oct 2015	097	027

Bulletin

The 4 sunspot groups currently visible on the solar disk are quiet. An active region (AR) is approaching the east limb and produced the only C-class flare of the period: C3.2 at 22:29UT. No earth-directed coronal mass ejections (CMEs) have been observed.

C-class flares are expected, with a small chance on an M-class flare from the AR just behind the east limb.

Solar wind speed continued its decline to values around 440 km/s until about 07:00UT, when a gradual increase was observed up to its current 500 km/s. Bz oscillated between -7 and +6 nT, with a sustained negative period at around -7nT between 08:00 and 11:00UT. The interplanetary magnetic field (IMF) was mostly directed away from the Sun (positive). Geomagnetic conditions ranged from quiet to unsettled, with a minor storming episode (Kp=5) during the 09-12UT interval. Active episodes were observed at Dourbes shortly before midnight. The high speed wind stream (HSS) from a wide northern coronal hole (CH) is expected to arrive later today and to continue possibly for the next two days.

Unsettled to active geomagnetic conditions are expected, with a good chance on minor geomagnetic storming episodes from the influence of the CH HSS.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 052, sur la base de 17 stations.

Indices solaires pour 11 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	085
AK Chambon La Forêt	021
AK Wingst	020
Ap estimé	018
Nombre international de taches solaires estimé	027 - 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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