Het archief bekijken van zaterdag 21 december 2019

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2019 Dec 21 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	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.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 12 stations.

Zon indexen voor 20 Dec 2019

Wolfgetal Catania	000
10cm zonneflux	070
AK Chambon La Forêt	009
AK Wingst	008
Geschatte Ap	006
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 14 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

Alle tijden in UTC

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