Affichage des archives de vendredi, 29 janvier 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Jan 29 1230 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
29 Jan 2016	109	006
30 Jan 2016	108	007
31 Jan 2016	107	010

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a C9.6 class flare. NOAA Active Region (AR) 2488 (Macintosh class:Dao; Mag. type:Beta-Gamma) has been most active, producing 4 C-class flares, including the C9.6 class flare, which peaked at 12:02 UT. ARs 2488, 2489 and 2490 all appear stable but have exhibited some flux emergence. There is currently a positive Northern polar coronal hole located in the North-West that may increase solar wind speeds. There were a series of small Coronal Mass Ejections (CMEs) off of the West limb, none of these are expected to interact with the Earth system. No Earth directed CMEs have been detected. Solar activity is expected to remain low over the next 24 hours with a high probability of C-class flares and a low probability of M-class flares. The solar wind speed has decreased from around 360 to 300 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component fluctuated around 0 nT, ranging between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-2 (Dourbes). A positive polar coronal hole is currently positioned in the Western hemisphere of the Sun and the resulting high-speed stream (HSS) may enhance solar wind speeds later today and as a consequence may increase geo-activity levels.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 063, sur la base de 11 stations.

Indices solaires pour 28 Jan 2016

Nombre de Wolf, observé par Catania	092
Flux solaire à 10 cm	110
AK Chambon La Forêt	007
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	069 - 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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