Affichage des archives de mercredi, 21 décembre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Dec 21 1248 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
21 Dec 2016	076	019
22 Dec 2016	077	006
23 Dec 2016	078	007

Bulletin

Solar activity was quiet in the past 24 hours. No flares were observed. There are two numbered sunspot group observed on the visible side of the sun, NOAA AR 2619 and NOAA AR 2620. Their magnetic configuration is simple. No Earth directed CMEs were observed. The large equatorial coronal hole with the low latitude extend became geoeffective today (21-Dec-2016). Solar proton flux intensity is expected to lie within the background levels. Solar activity is expected to be low with some probability for B-class flares. Variations of the solar wind parameters were very low till 04:00 UT today (21-Dec-2016). Then the expected fast solar wind stream from the large equatorial coronal hole arrived at the Earth. The solar wind speed increased from about 350 km/s till 640 km/s at 12:00 UT. Simultaneously, the Total Interplanetary Magnetic field (IMF) strength variations started to vary between 9 nT and 13 nT, while Bz oscillated between -13 nT and 13 nT. Geomagnetic conditions were ranged from quiet to moderate (K Dourbes between 1 and 3; NOAA Kp between 1 and 3). However the beginning of the minor geomagnetic storm can be expected in a few hours from now. The most probable expected value of the NOAA Kp index is 5.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 031, sur la base de 10 stations.

Indices solaires pour 20 Dec 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	075
AK Chambon La Forêt	015
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	025 - 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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