Affichage des archives de mardi, 1 décembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Dec 01 1246 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
01 Dec 2015	097	015
02 Dec 2015	098	016
03 Dec 2015	099	012

Bulletin

Solar activity has been low over the past 24 hours. The largest flare was a C3.6 class flare. NOAA Active Region (AR) 2458 (Cao Beta) has produced most of the activity, including the C3.6 flare peaking at 08:10 UT. Both ARs 2458 and 2459 have shown some evidence of flux emergence and have the potential to produce more activity. ARs 2457 and 2461 have rotated onto the West limb. The above-mentioned C3.6 flare has shown evidence of an associated EUV wave and coronal dimmings, indicating an associated eruption. There are currently no Coronagraph observations to verify this, but the source region is in a location likely to produce an Earth directed CME. A PRESTO will be issued once/if the presence of an associated CME is verified. The solar wind speed has fluctuated around 500 km /s over the past 24 hours. The total magnetic field has remained around 5 nT over the past 24 hours. The Bz component has oscillated between +5 and -5 nT. Geomagnetic conditions were quiet to moderate over the past 24 hours (NOAA Kp 1-3, local K Dourbes 1-3). There is currently a large positive polar coronal hole and smaller positive transient coronal hole at lower latitudes on the Sun which are probably the source of enhanced solar wind conditions at the Earth, the continued presence of these regions in the Western hemisphere may enhance solar wind conditions at the Earth over the next day. Geomagnetic conditions are expected to be quiet to unsettled.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 06 stations.

Indices solaires pour 30 Nov 2015

Nombre de Wolf, observé par Catania	051
Flux solaire à 10 cm	096
AK Chambon La Forêt	024
AK Wingst	014
Ap estimé	016
Nombre international de taches solaires estimé	/// - Basé sur /// 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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