Affichage des archives de lundi, 10 février 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Feb 10 1231 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
10 Feb 2020	071	006
11 Feb 2020	071	019
12 Feb 2020	071	012

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 for 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.

Solar wind continued to return towards an ambient background and slow solar wind speed regime. The wind speed decreased from around 450 km/s to around 350 km/s. Total interplanetary magnetic fields remained below 5 nT, the southward component ranged between -3.5 nT and 3.0 nT. Solar wind conditions are expected to further return to a nominal regime over the next few hours. Some enhancements are expected later in the day on February 10 and early February 11, with the arrival of fast solar wind streams in relation to a positive polarity coronal hole in the northern solar hemisphere, which was facing Earth on February 07.

Quiet geomagnetic conditions were observed with Kp-index (NOAA) and K-Dourbes index ranging between 0 and 2. Unsettle to active conditions is likely later on February 10 and February 11, when the solar wind streams from the positive polarity coronal hole is reaching Earth.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 09 Feb 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	011
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 17 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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