Affichage des archives de dimanche, 13 décembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Dec 13 1244 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 Dec 2015	120	010
14 Dec 2015	121	010
15 Dec 2015	118	009

Bulletin

Majority of the flaring activity during last 24 hours originated from the NOAA ARs 2470 and 2469 which just rotated from the behind of the East solar limb. The strongest, out of 6 C-class flares, was the C7.8 flare (peaking at 13:46 UT on December 12), which originated from the NOAA AR 2470, at that moment situated at the East solar limb. The flare was associated with rather narrow CME. The C5.3 flare (peaking at 10:34 UT today) originated from the NOAA AR 2468 which was at that moment situated rather close to the solar disc center. The flare was associated with the EIT wave, the coronal dimming and possibly Earth directed CME. More will be reported as soon as coronagraph data become available.

The solar wind speed is currently 490 km/s and the interplanetary magnetic field magnitude is about 4 nT. The fast flow from the narrow elongated low latitude coronal hole (between N8 and N30), which reached central meridian late on December 11, might arrive at the Earth in the morning of December 15. The geomagnetic conditions are quiet to unsettled and we expect it to remain so in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 075, sur la base de 13 stations.

Indices solaires pour 12 Dec 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	117
AK Chambon La Forêt	015
AK Wingst	013
Ap estimé	012
Nombre international de taches solaires estimé	079 - Basé sur 17 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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