Affichage des archives de mardi, 18 septembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Sep 18 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
18 Sep 2018	068	010
19 Sep 2018	067	005
20 Sep 2018	067	005

Bulletin

The visible side of the Sun is presently spotless and consequently there was no flaring activity reported during last 24 hours. We expect such a low flaring activity to persist in the coming hours. No Earth directed CMEs were observed, and the solar protons remained at the background level.

The solar wind speed is slowly decreasing and it presently amounts about 480 km/s. The interplanetary magnetic field magnitude is about 4 nT. The low latitudinal extension of the northern polar coronal hole has reached the central meridian this morning. The possible arrival of the associated fast solar wind might be expected at the Earth late on September 21 or in the morning of September 22. During last 24 hours the geomagnetic conditions were quiet to unsettled and we expect them to stay so in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 27 stations.

Indices solaires pour 17 Sep 2018

Nombre de Wolf, observé par Catania	013
Flux solaire à 10 cm	068
AK Chambon La Forêt	017
AK Wingst	015
Ap estimé	014
Nombre international de taches solaires estimé	013 - Basé sur 22 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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