Affichage des archives de dimanche, 1 février 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Feb 01 1222 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (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
01 Feb 2015	149	026
02 Feb 2015	145	027
03 Feb 2015	142	015

Bulletin

Only low-level C-class flares were observed during the period. NOAA 2268 produced a long duration C2.8 flare peaking at 04:36UT, and the strongest event of the period at 11:33 UT (C3.2 flare). Despite continued decay in its sunspot area, NOAA 2268 still has a mixed magnetic polarity trailing portion and showed some increased flaring activity. NOAA 2277's leading portion shows important magnetic polarity mixing, but the region remained mostly quiet. The larger than 10 MeV proton flux is back at nominal levels. C-class flaring is expected, with a chance on an isolated M-class flare. Active conditions were observed in response to the arrival of the HSS from the southern polar CH around midnight. Solar wind speed increased from about 400 to just over 550 km/s at the end of the period, with Bz varying between -8 and +10 nT. Further influence of the HSS is expected over the next two days. The geomagnetic field is expected to range from quiet to active conditions, with a possibility of a minor geomagnetic storm.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 083, sur la base de 04 stations.

Indices solaires pour 31 Jan 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	154
AK Chambon La Forêt	025
AK Wingst	011
Ap estimé	010
Nombre international de taches solaires estimé	/// - Basé sur /// 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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