Affichage des archives de vendredi, 5 février 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Feb 05 1230 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
05 Feb 2016	135	007
06 Feb 2016	140	006
07 Feb 2016	140	007

Bulletin

Solar activity was low during the past reporting period, though the amount of C-class flares is increasing. NOAA active region (AR) 2494 was responsible for most of the flares, including a C5.1 flare, peaking at 18h22 UT. NOAA AR 2494 has rapidly grown into a complex group. Some flux emergence and cancellation was occurring at NOAA 2493. NOAA AR 2491 has strongly decayed, while the spots in the trailing region of NOAA 2490 vanished almost completely. More flares at the C-level are expected, with an increasing chance for an M-class flare. No Earth-directed coronal mass ejections (CME) were observed.

The solar wind speed slightly increased to 500 km/s. The magnitude of the magnetic field was maximally 11 nT, but decreased to a current value of 5 nT. The north-south component was fluctuating between -7 and +10 nT.

Geomagnetic conditions were quiet (K=1-2) to unsettled (K=3), both at the local (Dourbes) and global level (NOAA estimate), which is expected to continue.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 109, sur la base de 10 stations.

Indices solaires pour 04 Feb 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	123
AK Chambon La Forêt	012
AK Wingst	005
Ap estimé	005
Nombre international de taches solaires estimé	116 - 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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