Affichage des archives de mardi, 27 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 27 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
27 Oct 2015	106	006
28 Oct 2015	106	007
29 Oct 2015	106	007

Bulletin

Solar activity was low. The X ray flux initially only briefly touched the C level with a C1 flare from Catania group 54 (NOAA 2436) peaking at 5:14UT. However, just before the end of the reporting period X-ray flux increased due to an ongoing C1.5 flare (peak at 12:11 UT) from a region at or beyond the East limb. The new Catania group 56 (NOAA 2440) grew as it was passing the central meridian with also another sunspot group (Catania 57) emerging behind it. Flaring is expected at C level mainly from the new regions, Catania 54 (NOAA2436) and the unnumbered region at the East limb. Yesterdays C2.1 flare seems to have caused a CME off the West limb, however currently available coronagraph images do not yet allow a conclusive analysis of its extent. Solar wind speed saw a gradual decline from around 480 km/s to 360 km/s. Total magnetic field also declined from around 6.8 nT to around 5 nT. Bz was between -3.5 nT and 4.4 nT. The magnetic field phi angle was stable in the positive sector. Geomagnetic conditions were quiet (both local K Dourbes and NOAA Kp 0-2). Solar wind conditions are expected to remain nominal with associated quiet geomagnetic conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 068, sur la base de 18 stations.

Indices solaires pour 26 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	106
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	071 - Basé sur 32 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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