Affichage des archives de lundi, 31 juillet 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jul 31 1231 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
31 Jul 2017	073	013
01 Aug 2017	075	013
02 Aug 2017	075	007

Bulletin

Returning Active Region NOAA 2665 produced a B9.2 flare which peaked at 9:12 UT on July 31. C flares from NOAA 2665 are possible in the next 48 hours, with a chance for M flares. No earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar wind speed measured by DSCOVR varied between about 320 and 380 km/s in the past 24 hours. Bz oscillated between about -5 and 4 nT. The Interplanetary Magnetic Field (IMF) was directed away from the Sun and its magnitude ranged between about 1 and 7 nT. Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 0 and 1) were registered in the past 24 hours. Active levels (K Dourbes = 4) are possible on July 31, August 1 and 2 due to the expected arrival of a high speed stream from a small negative equatorial coronal hole, with a slight chance for minor storm conditions (K Dourbes = 5).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 25 stations.

Indices solaires pour 30 Jul 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	007
AK Wingst	005
Ap estimé	005
Nombre international de taches solaires estimé	014 - Basé sur 26 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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