Affichage des archives de mardi, 7 avril 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Apr 07 1230 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (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 Apr 2015	120	009
08 Apr 2015	120	018
09 Apr 2015	120	017

Bulletin

The Sun released one C3.0 flare during the past 24 hours. It was produced by NOAA AR 2320, peaked at 19:06 UT on April 6 and was associated to a dimming, an EUV wave, a surge, a CME and a Type II radio burst. The CME was first observed by LASCO C2 at 19:24 UT and had an angular extent of about 140 degrees. The plane-of-sky speed derived by CACTUS was 339 km/s, while the Type II burst corresponds to a speed of 691 km/s. This CME may deliver a glancing blow in the second half of April 9. In the next 24 hours, more C flaring is expected, with a slight chance for an M flare, especially from AR 2320 and 2318. Solar wind speed gradually decreased from about 480 to 400 km/s over the past 24 hours, while the Interplanetary Magnetic Field magnitude varied between 1 and 5 nT. Over the past 24 hours, geomagnetic conditions have been quiet (K Dourbes between 0 and 3; NOAA Kp between 1 and 2). There is a chance for active geomagnetic levels (K Dourbes = 4) late on April 7 and on April 8, due to a possible glancing blow of the CME of April 4. Quiet conditions with active intervals are possible in the second half of April 9, as a result of a glancing blow from the CME of April 6.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 040, sur la base de 18 stations.

Indices solaires pour 06 Apr 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	126
AK Chambon La Forêt	010
AK Wingst	005
Ap estimé	005
Nombre international de taches solaires estimé	039 - Basé sur 19 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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