Affichage des archives de mercredi, 12 février 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Feb 12 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
12 Feb 2020	070	008
13 Feb 2020	071	010
14 Feb 2020	070	008

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc is spotless and the X-ray flux is below B-level. The solar activity is expected to remain at low levels over the next 24 hours.

No earth-directed coronal mass ejections (CMEs) have been observed in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

The influence of the high-speed stream coming from the positive polarity coronal hole has dropped on February 11 around 19:30 UTC when the phi angle switched to the negative sector. The solar wind parameters remained, however, slightly enhanced. The wind speed first decreased up to 350 km/s to then re-increase up to 420 km/s, the total interplanetary magnetic fields was below 6 nT, and the southward magnetic component fluctuated between -4.5 nT and 5.0 nT. The solar wind conditions are expected to remain slightly enhanced for the next 24-hour period. Solar wind coming from the equatorial coronal hole (negative polarity) that reached the central meridian on February 9, may then contribute to the solar wind enhancement in about 1-2 days.

The geomagnetic conditions were quiet with few short periods of unsettle condition observed in Dourbes station (K-Dourbes = 3). We expect the geomagnetic conditions to remain mostly quiet with some short sporadic periods of unsettled condition for the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 22 stations.

Indices solaires pour 11 Feb 2020

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	071
AK Chambon La Forêt	008
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	000 - Basé sur 24 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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