Affichage des archives de samedi, 5 décembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Dec 05 1235 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
05 Dec 2015	097	013
06 Dec 2015	097	018
07 Dec 2015	096	014

Bulletin

Solar activity has been low over the past 24 hours. The largest recorded flare was an estimated C4.5 class flare (Using PROBA2 LYRA observations due to a data gap in GOES X-ray flux observations). NOAA Active Regions (AR) 2462 (Hax Alpha) and 2463 (Dao Beta) produced most of the activity, with AR 2462 producing the C4.5 flare peaking at 17:10 UT. There was an eruption off of the East limb associated with the C4.5 flare, but this is not expected to interact with the Earth. No Earth directed CMEs have been observed in the past 24 hours. Solar activity is expected to be low. ARs 2462 and 2463 have shown evidence of flux emergence and are expected to produce C-class flares and small eruptions, with a very small possibility of an M-class flare. The solar wind speed has been slowly increasing from around 370 km /s to 420 km/s over the past 24 hours. The total magnetic field strength has slowly increased from around 6 nT to 10 nT, and the Bz component has ranged from +10 to -10 nT. Geomagnetic conditions ranged between quiet and active (NOAA Kp 0-4, local K Dourbes 1-3). Quiet conditions are expected to continue for the rest of the day, but a large positive polar coronal hole (CH), with a section extending to low latitudes, has moved into the eastern hemisphere and is expected to enhance solar wind conditions on 06-Dec-2015 as the leading Co-rotating Interaction Region (CIR) interacts with the Earth system. The following High Speed Stream (HSS) will enhance conditions through 07-Dec-2015.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 043, sur la base de 09 stations.

Indices solaires pour 04 Dec 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	098
AK Chambon La Forêt	008
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	033 - Basé sur 25 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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