Affichage des archives de mardi, 11 septembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Sep 11 1401 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Moderate (ISES: Major) magstorm expected (A>=50 or K=6)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
11 Sep 2018	068	051
12 Sep 2018	069	031
13 Sep 2018	068	014

Bulletin

Solar activity was very low with X-ray flux below B level throughout the period. The only active region on disk (NOAA AR 2721) produced one A3.5 flare peaking at 12.53 UT yesterday. No earth-directed coronal mass ejections (CMEs) were observed. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain at very low levels. Solar wind speed increased from about 370 to about 600 km/s during the past 24 hours (DSCOVR) due to the influence of a co-rotating intercation region followed by the influence of a positive polarity coronal hole high speed stream. Due to the strong negative Bz varied between -13 and +11 nT geomagnetic conditions reached moderated storm level Kp index = 6 during 03-09 UT today and minor storm level locally at Dourbes (K = 5) during the same time interval. Geomagnetic activity is expected to continue mostly at the minor storm level today and tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 015, sur la base de 17 stations.

Indices solaires pour 10 Sep 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	042
AK Wingst	026
Ap estimé	025
Nombre international de taches solaires estimé	011 - 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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