Affichage des archives de vendredi, 12 septembre 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Sep 12 1251 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Severe magstorm expected (A>=100 or K>=7)

Moniteur de Flux de Proton

Proton event in progress (>10 MeV)

	Flux de 10 cm	Ap
12 Sep 2014	158	034
13 Sep 2014	162	063
14 Sep 2014	164	008

Bulletin

Over the last 24 hours, 2 M-class flares were produced by a currently unnumbered region at the northeast limb: an M2.1 flare peaking at 15:26UT, and an M1.4 flare peaking at 21:26UT. NOAA 2157 and 2158 produced 2 C-class flares each. The strongest was a C9.5 flare peaking at 02:24UT in NOAA 2157. Both of these regions have no longer a delta structure, but spots of opposite magnetic polarity are still close together. Based on the currently available imagery, no CMEs seem to have been associated to these flares. M-class flares are expected, with a chance on an X-class event. On 11 September around 23:00UT, ACE observed a shock in the solar wind. Wind speed abruptly changed from about 350 to 480 km/s. Bz oscillated between -14 and +11nT. This was the arrival of the halo CME related to the M4-flare from 9 September. The impact resulted in active geomagnetic conditions (Dourbes), while Kp reached minor geomagnetic storm levels. Also the proton flux slightly increased. The arrival of the halo CME from the X1 flare is expected for later today. Pending the orientation of the CME's magnetic field, this may result in a major geomagnetic storm, with locally severe geomagnetic storming possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 091, sur la base de 16 stations.

Indices solaires pour 11 Sep 2014

Nombre de Wolf, observé par Catania	208
Flux solaire à 10 cm	151
AK Chambon La Forêt	026
AK Wingst	011
Ap estimé	013
Nombre international de taches solaires estimé	113 - Basé sur 18 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

<< Aller à l'aperçu quotidien