Affichage des archives de mardi, 25 avril 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Apr 25 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
25 Apr 2017	081	014
26 Apr 2017	079	014
27 Apr 2017	078	008

Bulletin

There are three active regions, all with the simple configuration of the photospheric magnetic field, presently observed on the visible side of the solar disc. Solar activity is low with five low B-class and no C-class flares reported during last 24 hours. We do not expect change in the solar activity, and although C-class flares are possible, they are not very probable. No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

The solar wind speed is slowly decreasing and it presently amounts 600 km/s. The interplanetary magnetic field magnitude is about 5nT. Due to the influence of the fast solar wind, several intervals of the active conditions were reported during last 24 hours (Dourbes reported K=4 and NOAA Kp=4). The geomagnetic conditions are presently unsettled to active and we expect them to stay so in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 041, sur la base de 20 stations.

Indices solaires pour 24 Apr 2017

Nombre de Wolf, observé par Catania	050
Flux solaire à 10 cm	080
AK Chambon La Forêt	028
AK Wingst	020
Ap estimé	024
Nombre international de taches solaires estimé	046 - Basé sur 28 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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