Affichage des archives de samedi, 6 février 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Feb 06 1231 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
06 Feb 2016	120	006
07 Feb 2016	120	002
08 Feb 2016	120	005

Bulletin

Solar activity was low during the past reporting period, with only two C1 flares. Flaring activity originated from NOAA active regions (AR) 2494, 2496 and 2491. NOAA AR 2494 lost its delta component, but still has the potential to produce multiple C-class flares. All other regions were mainly unchanged and simple.

A partial halo CME was observed with first measurements in SOHO-LASCO/C2 around 19h36 UT on February 5. The CME was rather faint, but with an estimated angular width of about 120 degrees. The CME is propagating in the Southwest direction with an estimated projected speed of 450 km/s. The CME is associated with the eruption of a small filament near S20W20 (SDO/AIA 304 and GONG images) and seems to have an Earth directed component. An Earth-directed component may arrive at February 9 around 7h UT. Before the above mentioned eruption, two other small filaments disappeared as well (starting around 3h UT near S00W40 and one around 18h25 UT near S00E05). These eruptions did only result in insignificant coronagraphic signatures. More flares at the C-level are expected.

The magnitude of interplanetary magnetic field (IMF) returned to normal values around 5 nT. Solar wind speed is gradually decreasing with current values near 450 km/s.

Geomagnetic conditions were quiet (K=1-2) to unsettled (K=3), both at the local (Dourbes) and global level (NOAA estimate), with one single time slot of active (K=4) levels at Dourbes. Quiet to unsettled conditions are expected.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 080, sur la base de 08 stations.

Indices solaires pour 05 Feb 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	120
AK Chambon La Forêt	017
AK Wingst	014
Ap estimé	014
Nombre international de taches solaires estimé	108 - Basé sur 19 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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