Affichage des archives de lundi, 1 avril 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Apr 01 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
01 Apr 2019	070	021
02 Apr 2019	070	017
03 Apr 2019	070	022

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 new 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 390 and 430 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was predominantly directed towards the Sun and its magnitude varied between about 1 and 8 nT. There were no long intervals with Bz below -5 nT. A negative polarity coronal hole started crossing the central meridian on March 31. An associated high speed stream may arrive at Earth on April 3.

Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 3) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on April 1 and 2, with a chance for active levels (K Dourbes = 4). Active to minor storm intervals (K Dourbes = 4-5)are possible on April 3, due to the expected arrival of the high speed stream associated with a negative polarity coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 015, sur la base de 24 stations.

Indices solaires pour 31 Mar 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	014
AK Wingst	012
Ap estimé	011
Nombre international de taches solaires estimé	/// - Basé sur /// 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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