Affichage des archives de jeudi, 19 avril 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Apr 19 1231 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
19 Apr 2018	071	007
20 Apr 2018	073	016
21 Apr 2018	072	007

Bulletin

During last 24 hours only few low B-class were reported. All flaring activity originated from the active region which is rotating from the behind of the East solar limb. This active region might be the source of B-class and isolated C-class flares in the coming hours. The coronagraph images do not show signatures of a possibly Earth directed CME. The solar protons remain at the background level.

The solar wind speed is about 280 km/s and the interplanetary magnetic field magnitude is rather low with the value of about 2 nT. The increase of the solar wind speed, associated with equatorial coronal hole which reached central meridian on April 16 is expected later today, or tomorrow morning. The geomagnetic conditions are presently quiet. We expect quiet to unsettled conditions later today and possibly active geomagnetic conditions tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 007, sur la base de 27 stations.

Indices solaires pour 18 Apr 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	010
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	000 - Basé sur 29 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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