Affichage des archives de lundi, 19 février 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Feb 19 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
19 Feb 2018	069	019
20 Feb 2018	069	024
21 Feb 2018	069	012

Bulletin

There are no sunspot regions on the visible hemisphere of the Sun and flaring level is very low. The chance for a C flare in the next 24 hours is estimated at 5%. No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. Solar wind speed measured by DSCOVR was between about 520 and 670 km/s in the past 24 hours, with current values around 570 km/s. The Interplanetary Magnetic Field (IMF) was directed towards the Sun and its magnitude varied between about 2 and 8 nT. Bz was never below -5.5 nT. This enhanced solar wind is indicative of a negative coronal hole high speed stream. Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 5) were registered in the past 24 hours. Quiet to active levels (K Dourbes < 5) are possible on February 19, 20 and 21 due to the influence of the high speed stream associated with a negative coronal hole, with a chance for minor storm conditions (K Dourbes = 5).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 08 stations.

Indices solaires pour 18 Feb 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	026
AK Wingst	015
Ap estimé	015
Nombre international de taches solaires estimé	000 - Basé sur 27 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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