Affichage des archives de mercredi, 23 mai 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 May 23 1255 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
23 May 2018	072	015
24 May 2018	073	008
25 May 2018	074	007

Bulletin

Solar activity increased during the period due to a new region rotating around the East limb in the Northern hemisphere. This new region produced thirteen B-class flares among them the largest B8.9 flare peaking at 14:59 UT yesterday. 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 a significant chance for C-class flare. Solar wind speed gradually increased as expected from around 320 km/s to around 490 km/s during the period under the influence of positive polarity extension of the northern polar coronal hole. Total magnetic field varied from 2 to 12 nT, while Bz component varied from +10 to -9 nT. Geomagnetic conditions were mostly quiet until 06:00 UT today, then both local index (Dourbes) and planetary (NOAA) reached the value K = 3 due to the enhanced solar wind speed. Mainly unsettled and active geomgnetic conditions can be expected today and tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 14 stations.

Indices solaires pour 22 May 2018

Nombre de Wolf, observé par Catania	013
Flux solaire à 10 cm	071
AK Chambon La Forêt	013
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	013 - Basé sur 32 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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