Affichage des archives de samedi, 19 décembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Dec 19 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
19 Dec 2015	117	018
20 Dec 2015	117	013
21 Dec 2015	117	007

Bulletin

The Sun produced two C flares in the past 24 hours. The brightest flare was a C3.1 flare released by NOAA AR 2468, peaking at 2:04 UT on December 19. C flares are possible within the next 24 hours, with a chance (15%) for an M flare. During the past 24 hours, the solar wind speed gradually decreased from about 400 to 350 km/s with intermittent peaks up to 440 km/s. The magnitude of the Interplanetary Magnetic Field varied between 1 and 6 nT. During the past 24 hours, quiet to unsettled geomagnetic levels were registered (K Dourbes between 1 and 3, NOAA Kp between 1 and 3). Due to the expected arrival of the December 16 CMEs, active to minor storm conditions (K Dourbes = 4-5) are expected on December 19, with a chance for moderate to major storm conditions (K Dourbes = 6-7). Quiet to unsettled geomagnetic levels are expected on December 20 and 21, with a chance for active (K Dourbes = 4) excursions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 049, sur la base de 11 stations.

Indices solaires pour 18 Dec 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	117
AK Chambon La Forêt	009
AK Wingst	007
Ap estimé	005
Nombre international de taches solaires estimé	050 - Basé sur 14 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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