Affichage des archives de jeudi, 31 mai 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 May 31 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
31 May 2018	075	010
01 Jun 2018	076	035
02 Jun 2018	077	024

Bulletin

The Sun produced a few B flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at 40%, mainly from beta region NOAA AR 2712.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

Solar wind speed near Earth as registered by ACE and DSCOVR varied between about 320 and 405 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) fluctuated in its direction away from and towards the Sun, while its magnitude varied between about 0 and 6 nT. Bz was never below -5 nT. A high speed stream associated with a negative polarity equatorial coronal hole is expected to arrive near Earth late on May 31 or on June 1.

Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 2) were registered in the past 24 hours. Quiet to unsettled levels (K Dourbes < 4) are expected on May 31, with a chance for active to minor storm intervals (K Dourbes between 4 and 5) late on May 31 due to the expected arrival of the solar wind stream associated with the equatorial coronal hole. Active to minor storm levels are possible on June 1 and 2.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 023, sur la base de 20 stations.

Indices solaires pour 30 May 2018

Nombre de Wolf, observé par Catania	029
Flux solaire à 10 cm	075
AK Chambon La Forêt	010
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	022 - Basé sur 40 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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