Affichage des archives de samedi, 21 janvier 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jan 21 1321 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
21 Jan 2017	084	010
22 Jan 2017	083	007
23 Jan 2017	081	007

Bulletin

The increase of the solar activity in the last 24 hours was mainly due to flaring from the Catania sunspot group 81 (NOAA AR 2628) which produced 9 B-class and 5 C-class flares. The Catania sunspot group 80 (NOAA AR 2627) also produced several B-class flares. The strongest reported flare was compact and confined C9.3 flare originating from the Catania sunspot group 81 (NOAA AR 2628), which peaked at 07:14 UT on January 21. In the coming hours we can expect B-class and C-class flares, in particular from the Catania sunspot group 81 (NOAA AR 2628). No Earth directed CMEs were observed during last 24 hours.

The solar wind speed amounts 480 km/s, and the interplanetary magnetic field magnitude is about 5nT. Presently, the geomagnetic conditions are quiet to unsettled and we expect them to remain so in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 074, sur la base de 23 stations.

Indices solaires pour 20 Jan 2017

Nombre de Wolf, observé par Catania	073
Flux solaire à 10 cm	083
AK Chambon La Forêt	019
AK Wingst	013
Ap estimé	012
Nombre international de taches solaires estimé	055 - 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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