Affichage des archives de mercredi, 20 janvier 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Jan 20 1230 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
20 Jan 2016	099	011
21 Jan 2016	098	014
22 Jan 2016	097	015

Bulletin

NOAA 2484, which was spotless for most of its transit over the solar disk, developed over the last 24 hours and was the source of a C1 flare (07:34UT) and several B-class flares. It shows some magnetic mixing in its trailing section, and could produce another C-class flare before rounding the west limb. Some sunspot development was also observed in active regions NOAA 2488 and NOAA 2487, the latter bordering the top-end of a 20 degrees long north-south oriented filament. A coronal mass ejection (CME) first seen in LASCO/C2 on 19 January at 12:24UT was related to a backside event. No earth-directed CMEs were observed.

There's a chance on another C-class flare. . Solar wind speed undulated between 350 and 410 km/s. Bz was initially at a steady +10 nT until shortly after midnight, when it gradually turned negative with peak values near -14 nT around 08:30UT and at the end of the period. The geomagnetic field was mostly quiet to unsettled, with active conditions observed on planetary (06-09UT and 09-12UT intervals) and local (Dourbes, at 10-11UT) levels. A southern polar coronal hole (CH) extension at -25 to -30 degrees latitude has nearly finished its transit over the Central Meridian (CM).

Quiet to active geomagnetic conditions are expected over the next two days, with a small chance on a minor storming episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 065, sur la base de 09 stations.

Indices solaires pour 19 Jan 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	098
AK Chambon La Forêt	009
AK Wingst	012
Ap estimé	010
Nombre international de taches solaires estimé	066 - Basé sur 25 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

<< Aller à l'aperçu quotidien