Affichage des archives de mercredi, 29 novembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Nov 29 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
29 Nov 2017	072	010
30 Nov 2017	071	006
01 Dec 2017	070	005

Bulletin

Solar activity was at very low levels. Decaying sunspot region NOAA 2689 was quiet. The leading part of the prominent 40 degrees long filament has started to round the SW limb. 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 slight chance on an isolated C-class flare.

Solar wind speed undulated between 400 and 430 km/s, with Bz oscillating between -6 nT and +7 nT. The interplanetary magnetic field was mostly directed towards the Sun.

The geomagnetic field was quiet throughout the period. Mostly quiet to unsettled conditions are expected, with a possibility on an active episode if the glancing blow from the 25 November CME arrives or the wind stream of the negative polar coronal hole (CH) extension intensifies.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 013, sur la base de 10 stations.

Indices solaires pour 28 Nov 2017

Nombre de Wolf, observé par Catania	016
Flux solaire à 10 cm	072
AK Chambon La Forêt	009
AK Wingst	007
Ap estimé	007
Nombre international de taches solaires estimé	016 - Basé sur 27 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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