Affichage des archives de samedi, 20 août 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Aug 20 1337 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
20 Aug 2016	081	005
21 Aug 2016	079	005
22 Aug 2016	077	012

Bulletin

Solar activity was very low in the past 24 hours. A B4.4 flare was observed today 20-Aug-2016 coming from the active region AR NOAA 2578 (peaking at 06:00 UT). Two additional active regions are presently observed on the visible side of the solar disc. Their photospheric magnetic field configuration is simple (alpha configuration). There is a transequatorial coronal hole observed presently on the visible solar disc which may become geoeffective in 3-4 days. No Earth-directed CME has been observed. Solar proton flux intensity is expected to lie within the background levels. Solar activity is expected to be low with small probability for B-class flares. The variations of the solar wind parameters were weak. Solar wind speed remained below 400 km/s during the last 24 hours. The magnitude of the Interplanetary Magnetic Field (Bt) elevated till 8 nT this morning (20-Aug-2016) and then it smoothly decreased till 5 nT. The Bz component demonstrated one variation within the interval 7nT : -4 nT and afterwards remained neutral. Geomagnetic conditions have been very quiet in the past 24 hours (K Dourbes between 1 and 3; NOAA Kp between 1 and 2). Geomagnetic activity is expected to continue at very low levels today (20-08-2016) and tomorrow (21-08-2016). Active to minor geomagnetic storm conditions (K Dourbes = 3-4) are possible later as a possible response to the transequatorial negative polarity coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 019, sur la base de 16 stations.

Indices solaires pour 19 Aug 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	081
AK Chambon La Forêt	012
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	050 - Basé sur 23 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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