Affichage des archives de lundi, 21 décembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Dec 21 1235 UTC

Prévisions SIDC

Éruptions solaires

M-class flares expected (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
21 Dec 2015	126	021
22 Dec 2015	133	006
23 Dec 2015	138	005

Bulletin

An unnumbered sunspot group that just appeared at the east solar limb produced the most of the flaring activity in the past 24 hours, including 9 C-class flares and 2 M-class flares. The strongest one was the M2.8 flare peaking at 01:03 UT today. It was accompanied only with a narrow CME that will not arrive at the Earth. We expect more M-class flares from this group, with a small chance for an X-class event. The Earth is now inside the trailing part of the ICME that arrived after the interplanetary shock detected on December 19. Currently the solar wind speed is around 360 km/s and the interplanetary magnetic field (IMF) magnitude is around 17 nT. The north-south IMF component Bz just turned northward, so the geomagnetic storm conditions ended, with Dourbes reporting K = 3 and NOAA reporting Kp = 4 during the last interval. Unsettled to active geomagnetic conditions are probable in the coming hours, with isolated intervals of minor storm possible (although unlikely) in case of Bz turning consistently southward again.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 017, sur la base de 08 stations.

Indices solaires pour 20 Dec 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	117
AK Chambon La Forêt	106
AK Wingst	065
Ap estimé	070
Nombre international de taches solaires estimé	019 - Basé sur 20 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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