Affichage des archives de mercredi, 18 septembre 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Sep 18 1230 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
18 Sep 2019	068	013
19 Sep 2019	068	008
20 Sep 2019	067	007

Bulletin

Solar X ray flux remained below B level throughout the period. With a spotless disk, X-ray flux is expected to remain at or below background levels.

There were no Earth-directed CMEs observed in coronagraph data.

Proton levels were at background values and are expected to remain so.

Solar wind conditions were near nominal with solar wind slightly increasing to between 400-450 km/s and total magnetic field in the 2-7nT range. The magnetic field phi angle switched to the positive sector around 20:30UT. There was a possibility of enhanced solar wind conditions under the possible influence of a negative polarity coronal hole in the southern hemisphere, but this does not seem to occur. Solar wind conditions are expected to remain near nominal.

Geomagnetic conditions were quiet to active (NOAA Kp and local K Dourbes 1-4). Geomagnetic conditions are expected to be quiet to unsettled with initially an isolated active period still possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 28 stations.

Indices solaires pour 17 Sep 2019

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	016
AK Wingst	011
Ap estimé	011
Nombre international de taches solaires estimé	000 - Basé sur 29 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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