Affichage des archives de dimanche, 3 décembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Dec 03 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Moderate (ISES: Major) magstorm expected (A>=50 or K=6)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
03 Dec 2017	071	004
04 Dec 2017	070	054
05 Dec 2017	070	045

Bulletin

Solar activity was at very low levels. The Sun is spotless. 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.

ACE data indicated solar wind speed decreased further from initial values near 400 km/s to about 350 km/s by the end of the period. Bz varied between +3 nT and -4 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 field was quiet to unsettled levels throughout the period, and is expected to remain so 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, their influence may start affecting the earth environment 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 09 stations.

Indices solaires pour 02 Dec 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	072
AK Chambon La Forêt	006
AK Wingst	003
Ap estimé	003
Nombre international de taches solaires estimé	000 - Basé sur 13 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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