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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Feb 23 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
23 Feb 2017	084	020
24 Feb 2017	084	026
25 Feb 2017	084	008

Bulletin

Catania group 96 (NOAA region 2638) produced the first C flare since the past month, a C4.1 flare peaking at 13:27UT. The amount of mixed polarity field in the middle portion and surroundings of the leading spot has meanwhile diminished. There remains a chance for C flaring from this region. No Earth directed CMEs have been observed in coronagraph data. Proton fluxes are at background levels and expected to remain so.

Since 4:00UT solar wind speed has shown the expected increase under the equatorial coronal hole influence, from around 400 km/s to 450-500 km/s. Total magnetic field increased over the whole period to around 10 nT with Bz variable and not below -5nT. Solar wind conditions are expected to become further enhanced and remain so over the next 48 hours. Geomagnetic conditions were quiet to unsettled (local K Dourbes 1-3, NOAA Kp 1-2). Active periods must be anticipated under the enhanced solar wind conditions with also minor geomagnetic storm periods possible.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 024, basierend auf 09 Stationen.

Solarindizes für den 22 Feb 2017

Wolf-Zahl Catania	028
10cm Solarflux	083
AK Chambon La Forêt	012
AK Wingst	010
Geschätzer Ap-Wert	010
Geschätzte internationale Sonnenfleckenzahl	026 - Basierend auf 16 Stationen

Zusammenfassung auffälliger Ereignisse

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

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