Affichage des archives de vendredi, 14 avril 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Apr 14 1304 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
14 Apr 2017	074	017
15 Apr 2017	075	013
16 Apr 2017	074	011

Bulletin

Solar activity was at very low levels. No flares were observed during the reporting period. CACTUS detected a narrow NW CME from LASCO C2 images around 17:36 UT yesterday. This CME is not expected to be geoeffective. Integral proton flux for protons with energies above 10 MeV remained at background level. B-class flaring is expected.

Solar wind speed fluctuated strongly between 450 km/s to 400 km/s during the period. The interplanetary magnetic field gradually increased from 3 nT to 8 nT. Bz fluctuated between -3 and +3 nT before 00 UT and then gradually decreased to -6 nT. Geomagnetic conditions were ranged K Dourbes between 1 and 3; NOAA Kp between 1 and 4 during the reporting period. A high speed stream from a positive coronal hole (CH HSS) is expected to disturb further the solar wind environment. Active geomagnetic conditions are expected. Isolated episodes of minor storm are possible

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 016, sur la base de 15 stations.

Indices solaires pour 13 Apr 2017

Nombre de Wolf, observé par Catania	028
Flux solaire à 10 cm	074
AK Chambon La Forêt	014
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	024 - Basé sur 30 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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