Affichage des archives de mardi, 20 septembre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Sep 20 1238 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
20 Sep 2016	083	026
21 Sep 2016	083	016
22 Sep 2016	083	007

Bulletin

Solar activity was very low. No C flares were observed in the past 24 hours. Solar activity is expected to remain very low (no C flaring) for the next 24 hours. Solar wind speed measured by DSCOVR rose gradually from about 390 to about 720 km/s after the arrival of a coronal hole high speed stream around 0h UT on September 20. Meanwhile the magnitude of the Interplanetary Magnetic Field increased from about 10 nT to a maximum of about 21 nT around 20:30 UT on September 19, and decreased again to current values around 5 nT. Bz was predominantly positive, but was mainly below -5 nT between 23h and 1h UT. Quiet to unsettled geomagnetic conditions (K Dourbes < 4) prevailed on September 19. K Dourbes values reached up to 4 and Kp values up to 5 during the first half of September 20. There is a chance for minor storm levels (K Dourbes = 5) on September 20 under the influence of the coronal hole high speed stream. Quiet to unsettled levels are expected on September 21 and 22, with a chance for active levels (K Dourbes = 4) on September 21 as the influence of the high speed stream wanes.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 056, sur la base de 19 stations.

Indices solaires pour 19 Sep 2016

Nombre de Wolf, observé par Catania	076
Flux solaire à 10 cm	083
AK Chambon La Forêt	024
AK Wingst	010
Ap estimé	009
Nombre international de taches solaires estimé	063 - Basé sur 27 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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