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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 May 13 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Major magstorm expected (A>=50 or K>=6)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
13 May 2015	160	038
14 May 2015	158	038
15 May 2015	156	018

Bulletin

NOAA 2339 is decaying and produced only low-level C-class flares. NOAA 2342 produced the strongest flare of the period, a C3.5 flare peaking at 05:59UT and located in its trailing portion. The flare was associated with a series Type III radio-burst, and a surge was observed in H-alpha. The greater than 10 MeV proton flux is nearly back at nominal levels. No earth-directed coronal mass ejections (CME) were observed over the period.

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

Moderate geomagnetic storming has been observed as the Earth is under the influence of the high speed stream (HSS) of a recurrent coronal hole. Kp reached 6 between 03:00 and 09:00UT, while Dourbes reported a maximum K of 4. Solar wind speed is currently at about 700 km/s, while Bz-values were at -14 nT between 04:00 and 04:30UT.

Further episodes of minor to moderate geomagnetic storming are expected.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 121, basierend auf 20 Stationen.

Solarindizes für den 12 May 2015

Wolf-Zahl Catania	216
10cm Solarflux	163
AK Chambon La Forêt	031
AK Wingst	016
Geschätzer Ap-Wert	019
Geschätzte internationale Sonnenfleckenzahl	115 - Basierend auf 28 Stationen

Zusammenfassung auffälliger Ereignisse

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

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