Affichage des archives de lundi, 5 septembre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Sep 05 1231 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
05 Sep 2016	093	014
06 Sep 2016	095	014
07 Sep 2016	095	006

Bulletin

NOAA 2585 shows signs of decay. It produced the only two flaring events of the period: a B9.2 flare peaking at 18:17UT, and a B6.4 at 09:12UT. A potentially active region is about to rotate over the east limb. A 40-degrees long filament in the northwest quadrant is quiet. A slow coronal mass ejection (CME) was observed in LASCO/C2 imagery on 04 September starting at 13:36UT. It was most likely associated with a small reconnection event near S15W20 around 08:00UT. The CME seems to be mainly directed south of the ecliptic with no obvious earth-directed component.

C-class flares are possible, with a small chance on an isolated M-class event.

Solar wind parameters seem to indicate a weakening influence of the coronal hole (CH) high speed wind stream (HSS), with speed declining from initial values near 700 km/s to its current 600 km/s. Bz fluctuated between -5 and +5 nT, with the interplanetary magnetic field (IMF) directed away from the Sun (positive). Mostly unsettled to active geomagnetic conditions were reported by Dourbes. Kp reached minor storm levels during the 18-21UT interval.

Quiet to active geomagnetic conditions are expected, with still a small chance on a minor storming episode. Geomagnetic conditions are expected to return to mostly quiet levels over the next 2 days as the effects of the CH HSS are expected to further decline.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 031, sur la base de 17 stations.

Indices solaires pour 04 Sep 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	097
AK Chambon La Forêt	039
AK Wingst	030
Ap estimé	034
Nombre international de taches solaires estimé	049 - Basé sur 29 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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