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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 May 20 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
20 May 2016	101	013
21 May 2016	100	011
22 May 2016	099	010

Bulletin

Over the past 24 hours solar activity has been low. The largest flares were two B3.9 class flares, produced by Active Region (AR) 2546 (Mcintosh class:Cho; Mag. type:Beta). All other ARs have been quiet. Solar protons have remained at background levels over the past 24 hours. There have been no Earth directed CMEs detected. Solar activity is expected to remain low over the next 24 hours with a small probability of C-class flares. The solar wind speed has remained around 450 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 5 and 9 nT. The Bz component fluctuated between -5 and +6 nT, but has been largely positive. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. A large Northern positive polar coronal hole is currently positioned in the Western hemisphere of the Sun that may enhance solar wind speeds at the Earth.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 047, sur la base de 13 stations.

Indices solaires pour 19 May 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	099
AK Chambon La Forêt	016
AK Wingst	008
Ap estimé	008
Nombre international de taches solaires estimé	045 - Basé sur 22 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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