Affichage des archives de jeudi, 18 mai 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 May 18 1231 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
18 May 2017	072	010
19 May 2017	072	020
20 May 2017	072	024

Bulletin

In the past 24 hours, no C flares were observed. Very low solar activity (no C flares) is expected in the next 24 hours. Solar wind speed measured by DSCOVR decreased from about 470 to 400 km/s in the past 24 hours. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 1 and 10 nT. Enhanced solar wind conditions are expected to start in the second half of May 19 due to the arrival of a high speed stream from a negative equatorial coronal hole. Quiet to unsettled geomagnetic conditions (K Dourbes between 2 and 3; NOAA Kp between 1 and 4) were registered in the past 24 hours. Quiet to unsettled levels are expected on May 18 and the first half of May 19, with a slight chance for active geomagnetic levels (K Dourbes = 4). Active (K Dourbes = 4) to minor storm conditions (K Dourbes = 5) are possible in the second half of May 19 and on May 20, due to the expected high speed stream.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 023, sur la base de 14 stations.

Indices solaires pour 17 May 2017

Nombre de Wolf, observé par Catania	044
Flux solaire à 10 cm	071
AK Chambon La Forêt	///
AK Wingst	009
Ap estimé	009
Nombre international de taches solaires estimé	012 - 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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