Affichage des archives de mardi, 21 novembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Nov 21 1308 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
21 Nov 2017	074	032
22 Nov 2017	075	015
23 Nov 2017	074	011

Bulletin

Over the past 24 hours solar activity has been quiet. No significant flares have been recorded. All Active Regions (AR) have shown low levels of 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 been increasing from 300 and 600 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 4 nT and 14 nT. The Bz component has fluctuated between positive and negative, fluctuating between -13 and +14 nT. Geomagnetic conditions ranged between Kp index 1-4 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours. A positive polar coronal hole is currently positioned in the Western hemisphere of the Sun and the resulting high-speed stream (HSS) has enhanced solar wind speeds and as a consequence increased geo-activity levels. Geomagnetic conditions are expected to remain unsettled throughout the day, but should begin to return to quiet conditions at the end of the day.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 12 stations.

Indices solaires pour 20 Nov 2017

Nombre de Wolf, observé par Catania	012
Flux solaire à 10 cm	074
AK Chambon La Forêt	026
AK Wingst	007
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 15 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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