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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2016 May 25 1230 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
25 May 2016	094	005
26 May 2016	093	021
27 May 2016	089	013

Bulletin

NOAA 2546 produced the strongest flare of the period, a B9.5 flare peaking at 21:07UT on 24 May. The region remains the largest sunspot group currently visible, producing occasional B-class flares that are often accompanied by jet-like eruptions. The associated coronal mass ejections (CMEs) had no earth-directed component. The other sunspot groups (NOAA 2548 and tiny Catania 81) remained quiet.

Mostly quiet conditions are expected, with a small chance on an isolated C-class flare.

Solar wind speed mostly varied between 380 and 450 km/s. Bz undulated between -3 and +4 nT, with the Interplanetary Magnetic Field directed away from the Sun. A negative coronal hole (CH) on the northern hemisphere started transiting the central meridian around noon on 24 May. Quiet to unsettled geomagnetic conditions were observed.

Quiet to unsettled geomagnetic conditions are expected until the arrival of the co-rotating interaction region (CIR) associated with the wind stream from the small negative southern CH. A sector boundary crossing may precede or coincide with the CIR. The arrival of these structures is possible late on 25 May, but more likely on 26 May, and may result in active geomagnetic conditions with a slight chance on a minor storming episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 031, basierend auf 11 Stationen.

Solarindizes für den 24 May 2016

Wolf-Zahl Catania	027
10cm Solarflux	094
AK Chambon La Forêt	007
AK Wingst	006
Geschätzer Ap-Wert	006
Geschätzte internationale Sonnenfleckenzahl	024 - Basierend auf 27 Stationen

Zusammenfassung auffälliger Ereignisse

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

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