Affichage des archives de mercredi, 7 décembre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Dec 07 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
07 Dec 2016	079	008
08 Dec 2016	078	016
09 Dec 2016	077	015

Bulletin

Over the past 24 hours solar activity has been low. Flaring has been at the B-class level. Active Region (AR) 2615 (Mcintosh class:Dsi; Mag. type:Beta) has been most active, producing all the B-class flares. AR 2612 has now passed over the West solar limb. AR 2615 has shown some evidence of flux emergence and cancellation in HMI magnetogram observations, which may increase flaring activity. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a high probability of C-class flares and a low probability of M-class flares.

The solar wind speed has fluctuated between 330 and 400 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 5 nT and 10 nT. The Bz component has fluctuated between -10 and +6 nT, but has been negative most of the morning. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours, with the slightly enhanced values occurring due to the negative Bz. A large negative polarity Southern polar trans-equatorial coronal hole will be creating enhanced solar wind conditions over the coming days due to influences from the associated Co-Rotating-Interaction Region (CIR) and subsequent Coronal Hole (CH) High Speed Stream (HSS). As a consequence Geomagnetic conditions are expected to be quiet to unsettled.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 019, sur la base de 10 stations.

Indices solaires pour 06 Dec 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	080
AK Chambon La Forêt	///
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	033 - 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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