Affichage des archives de vendredi, 7 février 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Feb 07 1244 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
07 Feb 2020	071	012
08 Feb 2020	071	010
09 Feb 2020	071	007

Bulletin

X-ray flux remained below B level throughout the period. The Sun is spotless and no flaring is expected.

No Earth-directed CMEs have been observed in coronagraph data.

A low latitude positive polarity coronal hole on the Northern hemisphere is transiting the central meridian since this morning. It is expected to influence Solar wind conditions near Earth starting late February 10.

The proton flux levels were at background values and expected to remain so. High energy electron fluxes are expected to rise due to the ongoing high speed Solar wind conditions.

Solar wind conditions showed the passage of the high speed stream proper from the Southern polar coronal hole extension. Solar wind speed reached well over 600 km/s (to around 650 km/s around 2UT). Total magnetic field declined from around 10nT to under 5nT over the period. Bz was variable with some peaks don to -8nT. The magnetic field phi angle was in the negative sector throughout the period. Solar wind conditions are expected to remain enhanced initially, while decaying slowly over the next days.

Geomagnetic conditions reached minor storm levels locally (local K Dourbes 5 late yesterday) while NOAA Kp reached active levels (4) at most. Geomagnetic conditions are expected to be quiet to unsettled over the next days with initially some active periods still possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 17 stations.

Indices solaires pour 06 Feb 2020

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	071
AK Chambon La Forêt	031
AK Wingst	020
Ap estimé	021
Nombre international de taches solaires estimé	000 - Basé sur 25 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

<< Aller à l'aperçu quotidien