Affichage des archives de jeudi, 26 octobre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Oct 26 1230 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
26 Oct 2017	079	021
27 Oct 2017	079	017
28 Oct 2017	079	011

Bulletin

Quiet solar conditions were reported with the X-ray flux seeing only a low B2 class flare peaking at 23:59UT from Catania group 61 (NOAA region 2686). Both active regions on disk are relatively simple (Mag.Type: Alpha) and small. Especially Catania group 60 (NOAA region 2685) shrunk in size. The X-ray flux is expected to remain below C level. Proton flux levels were at background values and are expected to remain so. No Earth directed CME's were recorded in coronagraph data.

Solar wind speed saw peaks of close to 650 km/s before starting a gradual decline towards values of near 560km/s presently. Total magnetic field was mainly in the 4-6.5 nT range with Bz variable but predominantly negative in the last 6 hours with values down to -6.3 nT. The present influence of the coronal hole high speed stream will gradually fade and speeds should decline over the next 24-48 hours. Geomagnetic conditions were quiet to active (local K Dourbes 1-4 and NOAA Kp 2-4). Geomagnetic conditions are expected to remain quiet to active for the next 24 hours and quiet to unsettled afterwards as the coronal hole high speed stream fades.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 024, sur la base de 16 stations.

Indices solaires pour 25 Oct 2017

Nombre de Wolf, observé par Catania	023
Flux solaire à 10 cm	079
AK Chambon La Forêt	030
AK Wingst	023
Ap estimé	025
Nombre international de taches solaires estimé	024 - Basé sur 20 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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