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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2019 Dec 22 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

Quiet conditions (<50% probability of C-class flares)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
22 Dec 2019	070	005
23 Dec 2019	070	007
24 Dec 2019	070	017

Bulletin

Solar X ray flux remained below B level throughout the period. Apart from some very short lived spots, the visible disk was spotless and X-ray flux is expected to remain at background levels.

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

Solar high energy proton fluxes were at background levels and are expected to remain so. The >2MeV electron flux is enhanced (though not over the event threshold) as a consequence of the high speed stream passage but expected to slowly start a gradual return to background values.

Solar wind further returned to nominal, with Solar wind speed decreasing from around 390 km/s to under 340 km/s and total magnetic field in the 4-6nT regime. The magnetic field phi angle was in the positive sector. Solar wind conditions are expected to remain nominal in the coming days with later on December 24 a possible weak enhancement associated to the low latitude negative polarity coronal hole in the Southern hemisphere.

Geomagnetic conditions were quiet (both local K Dourbes and NOAA Kp 0-2) and this is expected to persist. From later December 24 we expect a slight increase to quiet to unsettled conditions.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 08 Stationen.

Solarindizes für den 21 Dec 2019

Wolf-Zahl Catania	///
10cm Solarflux	071
AK Chambon La Forêt	007
AK Wingst	005
Geschätzer Ap-Wert	004
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 18 Stationen

Zusammenfassung auffälliger Ereignisse

Zur Verfügung gestellt vom Solar Influences Data Analysis Center© - SIDC - Verarbeitet von SpaceWeatherLive

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