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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 May 16 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
16 May 2015	132	007
17 May 2015	127	016
18 May 2015	122	021

Bulletin

NOAA 2339 and 2342 produced a C2 class flare each. No other flaring events were observed. A large filament in the northeast quadrant erupted shortly before midnight. No obvious x-ray signature was associated with this event. No earth-directed coronal mass ejections (CMEs) have been observed.

Further C-class flaring is expected, with a slight chance on an M-class flare.

Solar wind speed declined further from 530 km/s to its current value of about 430 km/s. Bz varied between -4 and +2 nT. Quiet to unsettled geomagnetic conditions were observed. A recurrent positive polarity coronal hole (CH) has completed its central meridian transit.

The arrival of the 13 May CME and the high speed stream from the aforementioned CH are expected for late 17 or 18 May. This may result in active conditions, with a minor storming episode not excluded. Until then, quiet to unsettled geomagnetic conditions are expected.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 069, basierend auf 07 Stationen.

Solarindizes für den 15 May 2015

Wolf-Zahl Catania	///
10cm Solarflux	137
AK Chambon La Forêt	011
AK Wingst	008
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	089 - Basierend auf 26 Stationen

Zusammenfassung auffälliger Ereignisse

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

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