Affichage des archives de samedi, 29 décembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Dec 29 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
29 Dec 2018	069	014
30 Dec 2018	069	010
31 Dec 2018	069	004

Bulletin

Solar activity was at very low levels. The Sun was spotless. No earth-directed coronal mass ejections (CMEs) were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Earth remained under the influence of the High Speed Stream (HSS) associated with the positive polarity coronal hole (CH). Solar wind speed varied mostly between 550 and 610 km/s, showing a slight decline towards 500 km/s by the end of the period (DSCOVR). Bz varied between -7 and +8 nT before midnight, and between -4 and +2 nT afterwards. The interplanetary magnetic field was directed away from the Sun (positive sector). Geomagnetic activity ranged from quiet to active conditions.

Quiet to unsettled geomagnetic conditions are expected, with a waning chance on another active episode during the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 11 stations.

Indices solaires pour 28 Dec 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	069
AK Chambon La Forêt	026
AK Wingst	027
Ap estimé	028
Nombre international de taches solaires estimé	000 - Basé sur 20 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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