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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Oct 26 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
26 Oct 2017	079	021
27 Oct 2017	079	017
28 Oct 2017	079	011

Bulletin

Quiet solar conditions were reported with the X-ray flux seeing only a low B2 class flare peaking at 23:59UT from Catania group 61 (NOAA region 2686). Both active regions on disk are relatively simple (Mag.Type: Alpha) and small. Especially Catania group 60 (NOAA region 2685) shrunk in size. The X-ray flux is expected to remain below C level. Proton flux levels were at background values and are expected to remain so. No Earth directed CME's were recorded in coronagraph data.

Solar wind speed saw peaks of close to 650 km/s before starting a gradual decline towards values of near 560km/s presently. Total magnetic field was mainly in the 4-6.5 nT range with Bz variable but predominantly negative in the last 6 hours with values down to -6.3 nT. The present influence of the coronal hole high speed stream will gradually fade and speeds should decline over the next 24-48 hours. Geomagnetic conditions were quiet to active (local K Dourbes 1-4 and NOAA Kp 2-4). Geomagnetic conditions are expected to remain quiet to active for the next 24 hours and quiet to unsettled afterwards as the coronal hole high speed stream fades.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 024, basierend auf 16 Stationen.

Solarindizes für den 25 Oct 2017

Wolf-Zahl Catania	023
10cm Solarflux	079
AK Chambon La Forêt	030
AK Wingst	023
Geschätzer Ap-Wert	025
Geschätzte internationale Sonnenfleckenzahl	024 - Basierend auf 20 Stationen

Zusammenfassung auffälliger Ereignisse

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

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