Affichage des archives de mardi, 16 mai 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 May 16 1231 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
16 May 2017	074	017
17 May 2017	074	024
18 May 2017	074	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 increased from about 400 to a maximum around 680 km/s in the past 24 hours, with current values around 550 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 2 and 17 nT with current values around 4 nT. There were no long-lived negative Bz excursions. Continued high speed solar wind conditions are expected within the next 24 hours. Late on May 16 or on May 17, a glancing blow from the partial halo CME of May 13 may further enhance solar wind conditions. Quiet to unsettled geomagnetic conditions (K Dourbes between 2 and 3; NOAA Kp between 2 and 4) were registered in the past 24 hours. Under the influence of a high speed stream from a positive equatorial coronal hole, active geomagnetic levels (K Dourbes = 4) are possible on May 16, 17 and 18, with a chance for minor geomagnetic storm intervals (K Dourbes = 5) late on May 16 or on May 17.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 025, sur la base de 20 stations.

Indices solaires pour 15 May 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	023
AK Wingst	014
Ap estimé	015
Nombre international de taches solaires estimé	000 - 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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