Affichage des archives de samedi, 2 décembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Dec 02 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
02 Dec 2017	070	002
03 Dec 2017	069	007
04 Dec 2017	069	034

Bulletin

Solar activity was at very low levels. Active region NOAA 2689 rotated over the NW limb and left the solar disk spotless. The region produced a B1 flare at 14:10UT. 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.

Solar wind speed decreased from initial values near 460 km/s to values around 410 km/s by the end of the period. Bz varied between +5 nT and -5 nT. The interplanetary magnetic field was mostly directed towards the Sun. The extension of a positive northern polar CH is transiting the central meridian.

The geomagnetic activity was at unsettled to quiet levels. Quiet geomagnetic conditions are expected to continue until the arrival of the high speed stream from the northern polar coronal hole (CH) extension and its associated preceding co-rotating interaction region. Based on observations from the previous solar rotation and from STEREO-A, the earth environment may be affected starting late on 03 December or on 04 December, with minor to moderate geomagnetic storming possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 05 stations.

Indices solaires pour 01 Dec 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	011
AK Wingst	010
Ap estimé	008
Nombre international de taches solaires estimé	000 - Basé sur 15 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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