Affichage des archives de samedi, 9 décembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Dec 09 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
09 Dec 2017	068	003
10 Dec 2017	066	004
11 Dec 2017	068	037

Bulletin

The solar activity remained quiet over the past 24 hours. The visible solar disc is spotless and no flare has been recorded. Quiet flaring conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The solar wind speed has continued to gradually decrease from 460 km/s to 380 km/s. The interplanetary magnetic field magnitude remained below 6 nT, and the Bz component fluctuated between -3 and 3 nT. The solar wind speed is expected to decline further to reach the nominal conditions. Enhancements of the solar wind conditions are expected when the high speed solar wind stream associated with the coronal hole (that transited the central meridian on Dec, 8) reaches Earth by Dec 11.

The geomagnetic conditions were quiet with K-Dourbes and Kp ranging between 1 and 2. The geomagnetic activity is expected to be quiet for the next following days until the arrival of the high speed stream on Dec 11.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 13 stations.

Indices solaires pour 08 Dec 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	000 - 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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