Affichage des archives de samedi, 21 mai 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 May 21 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
21 May 2016	102	022
22 May 2016	103	011
23 May 2016	105	015

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a B5.9 class flare, 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 been slowly increasing from around 400 to 500 km/s over the past 24 hours. The total magnetic field strength has slowly increased from 6 and 10 nT. The Bz component fluctuated between -10 and +10 nT, but has been largely negative this morning. Geomagnetic conditions ranged between Kp index 0-5 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours. The Kp reached 5 this morning as a result of the negative Bz and increasing solar wind speed. A large Northern positive polar coronal hole is currently positioned in the Western hemisphere of the Sun that may be the cause of enhanced solar wind speeds at the Earth.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 018, sur la base de 18 stations.

Indices solaires pour 20 May 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	100
AK Chambon La Forêt	012
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	044 - Basé sur 23 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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