Affichage des archives de mardi, 17 avril 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Apr 17 1230 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
17 Apr 2018	069	006
18 Apr 2018	069	006
19 Apr 2018	068	009

Bulletin

During last 24 hours three active regions emerged on the visible side of the Sun, but two of them already decayed. There are presently two numbered active regions observed, NOAA ARs 2704 and 2705, and both of them are spotless. The flaring activity is low and there were no C-class or even B-class flares reported. We expect such a low activity to persist in the coming hours. No Earth directed CMEs were observed in the coronagraph images, and the solar protons remained at the background level.

The Earth is still inside the slow solar wind with the speed of about 290 km/s and the interplanetary magnetic field magnitude is 3 nT. The increase of the solar wind speed, associated with equatorial coronal hole which reached central meridian on April 16 might be expected on April 19.The geomagnetic conditions are presently quiet and we expect them to stay so in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 20 stations.

Indices solaires pour 16 Apr 2018

Nombre de Wolf, observé par Catania	012
Flux solaire à 10 cm	069
AK Chambon La Forêt	006
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	007 - 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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