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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Feb 18 1923 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
18 Feb 2017	075	013
19 Feb 2017	076	031
20 Feb 2017	078	019

Bulletin

Solar conditions have been quiet with X-ray flux at background levels. Catania group 93 (NOAA 2636) decayed slightly while a new region is appearing at the North Eastern limb. There is only a slight chance for C flares. No Earth directed CMEs have been observed in coronagraph data. Proton flux values are at background levels and expected to remain so.

Solar wind conditions remained enhanced under the positive polarity coronal hole influence. Solar wind speed saw a peak close to 600 km/s while magnetic field was in the 4-9nT range with a period of sustained negative Bz (down to -7nT) around midnight. Enhanced solar wind conditions will continue over the next days. Geomagnetic conditions were quiet to active (both NOAA Kp and local K Dourbes 1-4), with the active periods around midnight associated to the negative Bz values. Periods of active geomagnetic conditions remain possible over the next days.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 011, basierend auf 17 Stationen.

Solarindizes für den 17 Feb 2017

Wolf-Zahl Catania	012
10cm Solarflux	075
AK Chambon La Forêt	038
AK Wingst	022
Geschätzer Ap-Wert	023
Geschätzte internationale Sonnenfleckenzahl	013 - Basierend auf 20 Stationen

Zusammenfassung auffälliger Ereignisse

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

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