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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2019 Dec 21 1230 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
21 Dec 2019	071	006
22 Dec 2019	071	007
23 Dec 2019	071	007

Bulletin

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

A filament erupted from the far Southern hemisphere this morning (between 6-9UT) but coronagraph data do not (yet) show any associated CME signatures. No Earth-directed CME's were detected in coronagraph images.

A low latitude negative polarity coronal hole started transiting the central meridian at midnight and may cause enhancements of Solar wind conditions starting December 24.

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 and is still expected to rise before starting a gradual recovery.

Solar wind showed a further decaying trend in the wake of the high speed stream. Solar wind speed decreased slowly from around 450 km/s to under 400 km/s. Total magnetic field was in a nominal 4-5nT regime. The magnetic field phi angle was in the positive sector. Solar wind conditions are expected to become and remain nominal in the coming days.

Geomagnetic conditions were quiet (local K Dourbes 1-2 and NOAA Kp 0-2) and this is expected to persist.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 12 Stationen.

Solarindizes für den 20 Dec 2019

Wolf-Zahl Catania	000
10cm Solarflux	070
AK Chambon La Forêt	009
AK Wingst	008
Geschätzer Ap-Wert	006
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 14 Stationen

Zusammenfassung auffälliger Ereignisse

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

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