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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2019 Oct 25 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

Quiet conditions (<50% probability of C-class flares)

Geomagnetismus

Minor storm expected (A>=30 or K=5)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
25 Oct 2019	065	040
26 Oct 2019	065	022
27 Oct 2019	065	010

Bulletin

Solar X ray flux remained below B level throughout the period. There are no active regions on disk and X-ray flux is expected to remain at background levels.

A filament erupted from the North-Western quadrant around 5UT as seen in SDO AIA 304 images. Limited STEREO A COR 2 data seem to indicate an associated CME. We await more complete coronagraph data from Earth perspective to assess if it is possibly Earth-directed. Otherwise no Earth-directed CME's were detected in coronagraph images.

Solar high energy proton fluxes were at background levels and are expected to remain so.

Solar wind showed the ongoing passage of the expected high speed stream. Solar wind speed rose from 500 km/s to around 600 km/s by the end of the period. Total magnetic field showed peaks close to 13nT but was mostly in the 6-9nT range. Bz was overall variable but mostly negative throughout the morning reaching under -6nT for some time. The magnetic field phi angle was steady in the positive sector. Solar wind conditions are expected to remain elevated over the next 12 hours before starting a gradual decay over the following days.

Moderate geomagnetic storming was observed (NOAA Kp 6 for the 6-9UT episode) while local conditions remained at active levels only (local K Dourbes 4). Minor geomagnetic storming is expected to continue over the next 12 hours before starting to decay into unsettled to active levels. Further episodes of moderate storm levels are meanwhile still possible.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 22 Stationen.

Solarindizes für den 24 Oct 2019

Wolf-Zahl Catania	///
10cm Solarflux	065
AK Chambon La Forêt	039
AK Wingst	024
Geschätzer Ap-Wert	023
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 23 Stationen

Zusammenfassung auffälliger Ereignisse

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

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