Affichage des archives de samedi, 26 avril 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Apr 26 1225 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
26 Apr 2014	122	005
27 Apr 2014	119	012
28 Apr 2014	117	005

Bulletin

Five low-level C-class flares were observed. They originated from behind the southwest limb (probably NOAA 2035), from sunspot groups NOAA 2038 and NOAA 2045, and from a region which was still behind the northeast limb. No CMEs with an Earth-directed component were observed. There remains a chance on further C-class flares. Solar wind speed declined from about 430 to 360km/s. Bz was weak and mostly negative at -4nT, with brief excursions up to +2nT. The particle stream from a small equatorial coronal hole that passed the central meridian early on 24 April, is expected to arrive at Earth most probably tomorrow. The geomagnetic field has been quiet and expected to remain so. Locally, a brief active interval is possible from the effect of the coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 034, sur la base de 12 stations.

Indices solaires pour 25 Apr 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	125
AK Chambon La Forêt	011
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	045 - 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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