Affichage des archives de mercredi, 19 décembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Dec 19 1231 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
19 Dec 2018	070	007
20 Dec 2018	070	008
21 Dec 2018	070	004

Bulletin

The Sun is spotless and did not produce any B flares or brighter in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 2%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed near Earth as registered by DSCOVR gradually increased from about 400 to 520 km/s in the past 24 hours (current values around 490 km/s), under the influence of a solar wind stream associated with an isolated negative polarity coronal hole. The Interplanetary Magnetic Field (IMF) was predominantly directed towards the Sun and varied between about 1 and 9 nT. Bz was never below -6 nT. Solar wind speed is expected to stay elevated on December 19 and the first half of December 20.

Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 3) were registered in the past 24 hours. There is a chance for active intervals (K Dourbes = 4) on December 19 and the first half of December 20. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected in the second half of December 20 and on December 21.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 09 stations.

Indices solaires pour 18 Dec 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	070
AK Chambon La Forêt	010
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 16 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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