Affichage des archives de jeudi, 17 août 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Aug 17 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
17 Aug 2017	077	032
18 Aug 2017	080	021
19 Aug 2017	082	007

Bulletin

NOAA AR 2671 continued to grow and has evolved into a beta-gamma- delta magnetic field configuration. Nevertheless, it has not produced any flare above the B-class level in past 24 h. The situation can change as this region will likely generate C-class flares, and has potential for M- (and even X-) class flares. It produced a CME directed to the west first seen at 14:00 UT (LASCO-C2) on August 16, that will most likely miss the Earth.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

Geomagnetic conditions have been disturbed due to the expected arrival of a high speed stream from a coronal hole (Kp reached 5 at 06:00 UT and the local K went up to 4 at 09:00 UT). Solar wind speed is increasing and currently around 550 km/s with interplanetary magnetic field intensity of 11 nT, with periods of negative Bz since early today. More disturbed conditions are expected in the next 48 h with K up to 6.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 040, sur la base de 19 stations.

Indices solaires pour 16 Aug 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	077
AK Chambon La Forêt	014
AK Wingst	008
Ap estimé	008
Nombre international de taches solaires estimé	030 - Basé sur 30 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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