Affichage des archives de jeudi, 20 août 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Aug 20 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
20 Aug 2015	099	017
21 Aug 2015	100	012
22 Aug 2015	101	012

Bulletin

Solar activity has slightly increased over the past 24 hours, with Active Region (AR) 2403 (Macintosh:Dac/Type:Beta) producing three C-class flares. However, the region appears relatively stable with a small amount of growth. There was a small filament destabilisation and eruption at 17:00UT on 19-Aug-2015 close to the south east limb of the Sun, but this is not believed to be Earth directed. No evident Earth directed Coronal Mass Ejections (CMEs) were produced in the past 24 hours. Solar activity is expected to remain relatively low over the next 24 hours, with AR 2403 producing C-class flaring activity with the small possibility of an M-class flare. The solar wind speed has been slowly increasing over the past 24 hours, from 450 km/s to 500 km/s. The total magnetic field has been around 9 nT, and the Bz component has been fluctuating between -8 nT and +8 nT over the past 24 hours. Geomagnetic conditions were quiet to active over the past 24 hours, with the local K index (Dourbes) reaching 4 and the Kp index (NOAA) also reaching 4 yesterday (2015-Aug-19), these conditions were possibly caused by a coronal hole (CH) located in the northern hemisphere, N35 W40, or from the CME/shock front produced at 09:36 UT on 2015-Aug-14, which was anticipated to reach Earth early today. The above mentioned CH maybe geo- effective creating further unsettled conditions at the earth.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 064, sur la base de 21 stations.

Indices solaires pour 19 Aug 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	098
AK Chambon La Forêt	027
AK Wingst	025
Ap estimé	025
Nombre international de taches solaires estimé	051 - Basé sur 21 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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