Affichage des archives de samedi, 21 avril 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Apr 21 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
21 Apr 2018	073	018
22 Apr 2018	073	010
23 Apr 2018	072	006

Bulletin

Solar flaring activity is rather low. Catania sunspot group 78 (NOAA AR 2706) was source of several B-class flares during last 24 hours. As Catania sunspot group 78 continues to have beta configuration of its photospheric magnetic field, we might expect B-class flares and possibly also isolated C-class flares in the coming hours. No Earth directed CMEs were observed in the coronagraph images. The solar protons continue to be at the background level.

Earth is presently inside the fast solar wind (speed of about 610 km/s) associated with the equatorial coronal hole. The interplanetary magnetic field magnitude is about 6nT. As the solar wind speed is rather high, together with the longer intervals of the Bz component of the IMF it might induce disturbed geomagnetic conditions in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 026, sur la base de 24 stations.

Indices solaires pour 20 Apr 2018

Nombre de Wolf, observé par Catania	015
Flux solaire à 10 cm	073
AK Chambon La Forêt	044
AK Wingst	040
Ap estimé	041
Nombre international de taches solaires estimé	016 - Basé sur 36 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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