Affichage des archives de samedi, 17 octobre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Oct 17 1231 UTC

Prévisions SIDC

Éruptions solaires

M-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
17 Oct 2015	113	016
18 Oct 2015	117	015
19 Oct 2015	120	009

Bulletin

Nine low-level C-class flares were recorded, the strongest a C4.3 flare from NOAA 2435 peaking at 13:24UT. There may still be an active region at the southeast limb trailing NOAA 2435. NOAA 2434 lost its small delta southeast of the main spot, but developed another one to the north. NOAA 2436 shows some magnetic complexity in its trailing portion. No earth- directed coronal mass ejections have been observed.

There's a chance on an M-class flare from any of the active regions NOAA 2434, 2435, or 2436.

Solar wind speed declined from 400 km/s to 350 km/s, with no sign of a high speed stream (HSS) from the trans-equatorial coronal hole (CH). Bz ranged between -5 and +7 nT. The interplanetary magnetic field (IMF) was mostly directed towards the Sun (negative). Quiet to unsettled geomagnetic conditions were observed. An equatorial CH will start transiting the central meridian later today and its HSS may affect the geomagnetic environment late on 20 or on 21 October.

Mostly quiet to unsettled geomagnetic conditions are expected, with a chance on an active episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 072, sur la base de 05 stations.

Indices solaires pour 16 Oct 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	109
AK Chambon La Forêt	010
AK Wingst	007
Ap estimé	007
Nombre international de taches solaires estimé	051 - 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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