Affichage des archives de jeudi, 24 août 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Aug 24 1309 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
24 Aug 2017	085	016
25 Aug 2017	084	008
26 Aug 2017	085	007

Bulletin

Active Region (AR) 2671 (McIntosh class: Fsi; Mag.type: Beta- Gamma) and AR 2672 (McIntosh class: Esi; Mag.type: Beta-Gamma) produced three C-class flares during the past 24 hours. The largest flare was C2.2 flare peaking at 13:43 UT yesterday. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10MeV proton flux remained at background levels over the past 24 hours. There are no potentially geoeffective coronal holes on the Sun. More C-class flares are expected over the next 24 hours. Solar wind parameters remained elevated over the past 24 hours. Total interplanetary magnetic field strength varied between 2 and 9 nT. The Bz component was mostly negative with a maximum southward deflection of -7.5 nT. Solar wind speed slightly decreased from about 620 till 413 km/s (at 12:30 UT) over the past 24 hours. Geomagnetic conditions have been disturbed due to the long period of negative Bz; Kp reached 5 at 15 UT and returned to Kp = 3 at 21 UT yesterday; the local K Dourbes also went up to 4. The geomagnetic environment is expected to be at unsettled to active levels today and tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 052, sur la base de 22 stations.

Indices solaires pour 23 Aug 2017

Nombre de Wolf, observé par Catania	065
Flux solaire à 10 cm	085
AK Chambon La Forêt	034
AK Wingst	024
Ap estimé	027
Nombre international de taches solaires estimé	066 - 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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