Affichage des archives de mercredi, 3 avril 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Apr 03 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
03 Apr 2019	071	022
04 Apr 2019	071	021
05 Apr 2019	071	016

Bulletin

The Sun did not produce any flares in the past 24 hours. The chance for a C flare in the next 24 hours, especially from beta region NOAA AR 2737, is estimated at 5%.

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 DSCOVR varied between about 340 and 450 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was directed predominantly towards the Sun and its magnitude varied between about 1 and 8 nT. There were no long periods with Bz below -5 nT.

Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 4) were registered in the past 24 hours. Active to minor storm intervals (K Dourbes = 4-5) are possible on April 3 and 4, due to the expected arrival of the high speed stream associated with a negative polarity coronal hole. Active intervals (K Dourbes = 4) are possible on April 5.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 019, sur la base de 14 stations.

Indices solaires pour 02 Apr 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	018
AK Wingst	009
Ap estimé	008
Nombre international de taches solaires estimé	018 - Basé sur 23 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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