Affichage des archives de vendredi, 29 avril 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Apr 29 1231 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
29 Apr 2016	095	007
30 Apr 2016	098	017
01 May 2016	100	007

Bulletin

One C-class flare in past 24 h: C1.9 peaking at 12:51 UT on April 28, from NOAA 2535 (Catania 63). More C-class flares are likely.

Several CMEs occurred in the past 24 h, directed towards the north-east. Two of them on April 28, originated in the vicinity of NOAA AR 2335 (Catania 63). These are not remarkable events, but due to the proximity of the AR to the solar disk center, they require some attention. The first one at 02:12 UT (LASCO-C2) was very slow and faint, no Earth effect is expected. The second one at 07:12 UT was also slow and most likely will not affect the Earth, but a glancing blow around May 2 cannot be discarded. A filament erupted from the eastern limb at 12:00 UT on April 28 (after a slow rise), the corresponding CME is not expected to affect Earth. Finally, on April 29, a CME erupted at 05:00 UT, this event is probably backsided (more data needed) and will not affect the Earth.

Geomagnetic conditions have been quiet. The solar wind speed is at 375 km/s with interplanetary magnetic field magnitude around 5 nT. The arrival of a fast speed stream within 48 h is expected to create minor storm conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 082, sur la base de 15 stations.

Indices solaires pour 28 Apr 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	095
AK Chambon La Forêt	006
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	094 - Basé sur 32 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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