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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2016 Dec 18 1346 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
18 Dec 2016	072	018
19 Dec 2016	071	016
20 Dec 2016	070	006

Bulletin

Solar activity is extremely low, without C-class flares reported. The only sunspot group observed during last two day, on the visible side of the sun, NOAA AR 2618, is presently at the west solar limb. We expect solar activity to remain on the same low level. The partial halo CME first seen in the SOHO LASCO C2 field of view at 03:36 UT on December 17 was a back side event and will not arrive to the Earth. No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed is presently about 440 km/s, and the interplanetary magnetic field is 4nT. Due to longer intervals of negative value of the Bz component of the interplanetary magnetic field (down to -8nT), active geomagnetic conditions were reported around midnight of December 17 and early morning today (local station at Dourbes reported K=4). The geomagnetic conditions are presently quiet to unsettled. We expect active conditions later today and tomorrow due to expected arrival of the fast solar wind associated with the low latitude extend of the northern polar coronal hole.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 034, basierend auf 11 Stationen.

Solarindizes für den 17 Dec 2016

Wolf-Zahl Catania	///
10cm Solarflux	072
AK Chambon La Forêt	014
AK Wingst	007
Geschätzer Ap-Wert	006
Geschätzte internationale Sonnenfleckenzahl	013 - Basierend auf 11 Stationen

Zusammenfassung auffälliger Ereignisse

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

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