Affichage des archives de mercredi, 8 novembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Nov 08 1244 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
08 Nov 2017	068	039
09 Nov 2017	068	043
10 Nov 2017	068	024

Bulletin

The solar activity remains very quiet as the solar disc is spotless; no flares and no active regions have been recorded in past 24 h on the disc. The X-ray flux is expected to remain below C level.

No Earth directed Coronal Mass Ejections (CMEs) have been observed and the solar protons flux remained at background levels over the past 24 hours.

The high speed solar wind stream associated with the northern extension Coronal Hole (which has crossed the central meridian on Nov 04) has arrived and the Earth is in the fast solar wind with a speed around 600 and 660 Km/s since yesterday Nov 07, 17:45 UT. The interplanetary magnetic field magnitude reached 20 nT at 16:45 UT on Nov 07 with the arrival of the co- rotating interaction region, then slowly decreased to 7-8 nT. The Bz component was many southward and reached -13 nT at 16:45 UT on Nov 07. Currently, the Bz remains manly southward around -7 nT. The solar wind conditions are expected to persist until Nov 10 while under the influence of the high speed stream associated with the coronal hole.

Disturbed geomagnetic conditions were observed due to the fast solar wind and the Bz component of the interplanetary magnetic field being manly southward. Geomagnetic storms were observed: NOAA reported Kp=6 from 18:00 UT Nov 07 to 6:00 UT Nov 08 and local station at Dourbes reported K=5 from 17:00 UT Nov 07 to 2:00 UT on Nov 08. Further minor to moderate geomagnetic storms cannot be excluded, especially if Bz component remains negative for long period of time.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 06 stations.

Indices solaires pour 07 Nov 2017

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	065
AK Wingst	034
Ap estimé	038
Nombre international de taches solaires estimé	000 - Basé sur 28 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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