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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 Apr 28 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

Eruptive (C-class flares expected, probability >=50%)

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
28 Apr 2015	100	014
29 Apr 2015	100	016
30 Apr 2015	100	018

Bulletin

Only three active regions (AR) are visible on the solar disk. Flaring activity was limited to an impulsive C1.9 flare from NOAA AR 2331, peaking at 5:19 UT on April 28. A filament eruption occurred from 2:55 UT, April 28 on near N10E50. Coronagraphic images are not available yet to analyze any associated CME. Further flaring at the C-level is expected. Earth is currently inside a slow solar wind (speed in the range 280-350 km/s). The magnitude of the interplanetary magnetic field (IMF) is stable near 7nT, with a mainly negative Bz and a negative (toward) phi angle. Quiet to unsettled (local K=0 to 3 at Dourbes) geomagnetic conditions were observed and are largely expected to remain so. There is some chance for a few time slots of active (K=4) to minor storm (K=5) conditions, due to an expected flow from a positive polarity coronal hole, on April 29 and 30.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 032, basierend auf 17 Stationen.

Solarindizes für den 27 Apr 2015

Wolf-Zahl Catania	///
10cm Solarflux	108
AK Chambon La Forêt	010
AK Wingst	007
Geschätzer Ap-Wert	006
Geschätzte internationale Sonnenfleckenzahl	035 - Basierend auf 25 Stationen

Zusammenfassung auffälliger Ereignisse

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

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