Affichage des archives de jeudi, 18 août 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Aug 18 1311 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
18 Aug 2016	083	007
19 Aug 2016	081	011
20 Aug 2016	079	007

Bulletin

Solar activity is very low with no C-class flares reported during last 24 hours. No Earth directed CMEs were observed. Four active regions are presently observed on the visible side of the solar disc. Their photospheric magnetic field configuration is simple (alpha configuration). Solar proton flux intensity is expected to lie within the background levels. We expect solar activity to remain low, with possibility of isolated C-class flares.

In the past 24 hours solar wind parameters variations were influenced most probably by the low latitude negative polarity coronal hole. The solar wind speed measured by DSCOVR varied between 450 and 380 km/s, while the magnitude of the Interplanetary Magnetic Field (Bt) first was around 10 nT until it started declining till around 4 nT ( at 12:00 UT on 18-Aug-2016). The Bz component fluctuated between +/-8 nT during the past 24 hours. The phi angle was mostly negative. The solar wind parameters variations are expected to decay. In the past 24 hours, quiet to unsettled geomagnetic levels were registered (K Doubes between 2 and 3; NOAA Kp between 2 and 3). Active levels (K Dourbes = 4) are possible on 20-Aug-2016 under the influence of the coronal hole high speed stream, with a slight chance for a minor geomagnetic storm.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 048, sur la base de 20 stations.

Indices solaires pour 17 Aug 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	083
AK Chambon La Forêt	015
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	059 - Basé sur 36 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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