Affichage des archives de jeudi, 22 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 22 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
22 Oct 2015	130	006
23 Oct 2015	130	006
24 Oct 2015	130	013

Bulletin

The Sun produced four C-class flares during the past period. The strongest flare was a C7.7 flare (peaking at 17:56 UT on October 21), originating from NOAA 2436. NOAA 2434 produced a long duration C4.4 flare (peaking at 3:40 UT on October 22), accompanied with a dimming and a CME. The CME was first observed in LASCO/C2 at 3:12 UT and is propagating southwest of the Sun-Earth line with a projected speed of about 800 km/s. Potentially an Earth-directed component will arrive on October 24. Flaring at the C-level is expected, but also an M-class flare is not excluded.

The solar wind speed gradually decreased from 450-480 km/s to current values near 400 km/s. The magnitude of the interplanetary magnetic field started at 10 nT, but quickly lowered to 5 nT. Geomagnetic conditions were quiet to unsettled and are expected to continue. The CME of this UT morning may cause a disturbance on October 24 around noon.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 096, sur la base de 09 stations.

Indices solaires pour 21 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	129
AK Chambon La Forêt	017
AK Wingst	011
Ap estimé	011
Nombre international de taches solaires estimé	084 - Basé sur 15 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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