Affichage des archives de jeudi, 4 février 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Feb 04 1235 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
04 Feb 2016	120	005
05 Feb 2016	125	006
06 Feb 2016	130	006

Bulletin

Solar flaring activity has slightly increased, with seven lower C-class flares (strongest C1.8) during the past 24 hours. The NOAA active regions (AR) 2490 (Catania 16), 2492, 2493 and a region currently rounding the East limb were responsible for this activity. Two new (yet unnumbered) regions are developing quite rapidly, near S10E15 and S08W20. A filament eruption was observed SouthEast of the disk center from 8h UT on February 3. The associated CME only left near 16h UT (first observation LASCO/C2) and was very narrow. A rather faint and slow CME (245km/s estimated by CACTus) lifted off at 9h36 UT on February 3 (first measurement at LASCO/C2), propagating to the SouthWest. The source of this CME is currently unclear, but will be analyzed further. More flaring at the C-level is expected, with a slight chance for an M-class flare. The solar wind speed ranged between 350 and 450 km/s, showing a slight increase. The magnitude of the magnetic field was around 10 nT, with a mainly positive Bz component.

Geomagnetic conditions were mainly quiet (K=0-2), both at the local (Dourbes) and global level (NOAA estimate). This situation is expected to continue, with a slight chance for time slots of unsettled to active conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 115, sur la base de 10 stations.

Indices solaires pour 03 Feb 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	112
AK Chambon La Forêt	007
AK Wingst	010
Ap estimé	012
Nombre international de taches solaires estimé	088 - Basé sur 21 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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