Affichage des archives de jeudi, 21 mai 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 May 21 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
21 May 2015	103	005
22 May 2015	101	007
23 May 2015	099	007

Bulletin

Solar activity was low. A single C flare was reported from NOAA region 2349 (now plage). The C1.2 flare peaked at 7:06UT. All current regions on disk have fairly simple configuration. Quiet conditions are expected with an occasional C flare possible. Yesterdays C1.6 flare did not seem to have any significant CME associated. No Earth directed CME's have been detected in the available coronagraph images. Solar wind conditions reflected the decline of the high speed stream influence with current conditions near nominal. Solar wind speed dropped from around 480 km/s to around 400 km/s. Total magnetic field was below 7nT and currently around 5.5 nT. Bz was mostly negative but remaining above -3.5 nT. Geomagnetic conditions were quiet (NOAA Kp 0-2, while the local Dourbes station currently out of service). Nominal solar wind conditions and associated quiet geomagnetic conditions are expected.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 036, sur la base de 17 stations.

Indices solaires pour 20 May 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	106
AK Chambon La Forêt	007
AK Wingst	009
Ap estimé	009
Nombre international de taches solaires estimé	041 - Basé sur 25 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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