Affichage des archives de vendredi, 24 août 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Aug 24 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
24 Aug 2018	071	032
25 Aug 2018	072	034
26 Aug 2018	071	021

Bulletin

X-ray flux remained below B level throughout the period. NOAA AR 2719 revived (Cro, Beta-Gamma) and there is a new region emerging near N7W20 which appears a fairly simple bipolar region. X-ray flux is expected to remain below C level.

No new Earth directed CMEs were observed in coronagraph data.

Proton flux levels were at background values and are expected to remain so.

Solar wind speed declined further to around 360 km/s. A number of sudden density and magnetic field increases occurred since around 6:00UT. These are possibly representing the first signs of the August 20 CME. Total magnetic field grew to 7nT with recently a peak of Bz down to -6nT. Further increases of magnetic field strength can be anticipated with the possibility of periods of persistent Southward magnetic field orientation over the next 24 to 48 hours. Afterwards, Solar wind conditions should recover to nominal.

Geomagnetic conditions were quiet (both local K Dourbes and NOAA Kp 0-2). Active geomagnetic conditions and possibly minor geomagnetic storms must be anticipated over the next 24 to 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 029, sur la base de 23 stations.

Indices solaires pour 23 Aug 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	006
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	016 - Basé sur 31 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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