Affichage des archives de lundi, 7 août 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Aug 07 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
07 Aug 2017	074	007
08 Aug 2017	075	013
09 Aug 2017	076	006

Bulletin

Over the past 24 hours solar activity has been very low. No significant flares have been recorded. Active Region (AR) 12670 (Mcintosh class:Hsx; Mag. type:Alpha) has been most active, producing a few B-class flares. However, AR 12670 has shown some evidence of flux emergence and cancellation in HMI magnetogram observations, which may result in flaring activity. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. The solar wind speed has decreased from around 650 to 500 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component fluctuated around 0 nT, ranging between -4 and +3 nT. Geomagnetic conditions ranged between Kp index 1-4 (NOAA) and local K index 0-4 (Dourbes) over the past 24 hours. There is currently a small positive polarity Northern polar coronal hole extending to lower latitudes located in the Western hemisphere and the resulting high-speed stream (HSS) may enhance solar wind speeds for a short period over the coming days. Geomagnetic conditions are expected to be quiet, with the possibility of a small enhancement later today or early tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 17 stations.

Indices solaires pour 06 Aug 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	074
AK Chambon La Forêt	022
AK Wingst	015
Ap estimé	016
Nombre international de taches solaires estimé	012 - 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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