Affichage des archives de mercredi, 18 décembre 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Dec 18 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
18 Dec 2019	071	020
19 Dec 2019	071	021
20 Dec 2019	071	017

Bulletin

Solar X ray flux remained below B level throughout the period. There are no active regions on disk and X-ray flux is expected to remain at background levels.

No Earth-directed CME's were detected in coronagraph images.

A small negative polarity equatorial coronal hole passed the central meridian overnight. It remains to be seen if it will have any influence on Solar wind conditions later in the week.

Solar high energy proton fluxes were at background levels and are expected to remain so.

Solar wind conditions showed the expected arrival of the high speed stream. Solar wind speed increased since midnight from just over 300 km/s to well over 500 km/s since. Total magnetic field reached a peak of 12nT with a Southward component of -10nT. Solar wind speed is expected to further increase, reaching over 600km/s and then level off by the end of the next 24 hour period before starting a slow and gentle decline.

Geomagnetic conditions were quiet to unsettled (both NOAA Kp and local K Dourbes reached 3 just only in the 9-12UT period). Geomagnetic conditions are expected to be unsettled to active over the next day and will continue to be at least unsettled for the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 14 stations.

Indices solaires pour 17 Dec 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	001
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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