Affichage des archives de mardi, 21 mars 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Mar 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 Mar 2017	075	023
22 Mar 2017	077	024
23 Mar 2017	079	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 has gradually increased from about 320 km/s around 21h UT on March 20 to a peak near 570 km/s around 10h UT on March 21, with current values around 520 km/s. In the same period, the magnitude of the Interplanetary Magnetic Field has risen from about 5 nT to a maximum of 18 nT around 7:20 UT on March 21, with current levels around 10 nT. Bz was below -10 nT between about 5:45 and 6:20 UT on March 20, and has fluctuated a lot outside of this interval. The enhanced solar wind conditions are expected to continue on March 21 and 22. Quiet to active geomagnetic conditions (K Dourbes between 1 and 4; NOAA Kp between 0 and 4) were registered in the past 24 hours. Due to the enhanced solar wind conditions by the passage of a high speed stream from a positive coronal hole, quiet to active levels (K Dourbes < 5) are expected on March 21, 22 and 23, with a chance for minor geomagnetic storm intervals (K Dourbes = 5).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 13 stations.

Indices solaires pour 20 Mar 2017

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	073
AK Chambon La Forêt	007
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	000 - Basé sur 18 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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