Affichage des archives de mercredi, 30 juillet 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Jul 30 1251 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
30 Jul 2014	150	006
31 Jul 2014	155	004
01 Aug 2014	160	004

Bulletin

The largest event of the period was a C4 flare peaking at 16:33UT on 29 July in the trailing portion of NOAA 2130. This area shows some mixed magnetic polarities and was also the source of one C3 and three C1 flares. NOAA 2125 and 2127 contributed with a C1 flare each. NOAA 2126 has simplified and remained quiet. The long filament in the NE quadrant erupted early this morning between 04:30 and 05:30UT. According to the currently available STEREO-imagery, the associated CME was directed mostly to the north and away from Earth. Another CME was first observed by SOHO/LASCO at 01:25UT and was also associated to a filament eruption at or just behind the east limb. This CME is not directed to Earth. The filaments near the NE-limb and south near the Central Meridian (CM) were relatively stable. Further C-class flaring is expected, with a small chance for an M-class flare from NOAA 2127 and 2130. Solar wind speed declined further from 350 to 310 km/s, with Bz varying between -5 and +3 nT. A small equatorial hole is approaching the CM and may influence the geomagnetic field around 4 August. Geomagnetic conditions were quiet and are expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 097, sur la base de 18 stations.

Indices solaires pour 29 Jul 2014

Nombre de Wolf, observé par Catania	189
Flux solaire à 10 cm	142
AK Chambon La Forêt	009
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	105 - Basé sur 29 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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