Affichage des archives de jeudi, 24 mai 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 May 24 1316 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
24 May 2018	073	004
25 May 2018	072	006
26 May 2018	073	007

Bulletin

Newly numbered Catania sunspot group 84 rotating around the East limb produced multiple B flares yesterday. The largest flare was a C2.0 flare peaking at 18:21 UT. NOAA Active Regions 2710 and 2711 were mostly inactive. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. Solar activity is expected to be at low levels with some probability for C-class flares. Solar wind parameters decreasing varitations indicate fainting influence of positive polarity extension of the northern polar coronal hole. Solar wind speed gradually decreased during the period till around 470 km/s after reaching maximum of 550 km/s at 17:00 UT yesterday. Total magnetic field magnitude declined from 6.5 to 2 nT, while Bz component is varying now between -1.7 and +1.7 nT. Geomagnetic conditions reached unsettled levels (K= 3) during 06 - 15 UT yesterday, then both local index (Dourbes) and planetary (NOAA) returned to quiet levels. Mainly quiet geomgnetic conditions can be expected from now.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 035, sur la base de 22 stations.

Indices solaires pour 23 May 2018

Nombre de Wolf, observé par Catania	031
Flux solaire à 10 cm	073
AK Chambon La Forêt	012
AK Wingst	010
Ap estimé	012
Nombre international de taches solaires estimé	027 - Basé sur 27 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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