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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2016 Oct 18 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
18 Oct 2016	078	013
19 Oct 2016	079	012
20 Oct 2016	080	017

Bulletin

Over the past 24 hours solar activity has been low. there were no significant flares and all Active Regions (AR) have shown low levels of activity. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. There is evidence in EUV imagery (EUV wave and dimming) of a small eruption at 21:10 UT on 2016-Oct-17, from AR 2602 (Mcintosh class:Cao; Mag. type:Beta). As the source is near disk centre it may produce a halo CME in coronagraph imagery. However, Coronagraph imagery for this period is currently unavailable. The size of the wave and the dimming indicate a small eruption, but possibly Earth directed, if significant a PRESTO will be issued. The solar wind speed has been slowly decreasing from around between 750 and 600 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component fluctuated around 0 nT, ranging between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 2-4 (NOAA) and local K index 2-4 (Dourbes) over the past 24 hours. The enhanced solar wind speeds are associated with a High Speed Stream (HSS) from a large negative polarity Southern polar coronal hole located in the western hemisphere. As the hole rotates towards the limb the speed is expected to abate. Geomagnetic conditions are expected to be quiet to unsettled.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 029, basierend auf 13 Stationen.

Solarindizes für den 17 Oct 2016

Wolf-Zahl Catania	024
10cm Solarflux	076
AK Chambon La Forêt	035
AK Wingst	025
Geschätzer Ap-Wert	025
Geschätzte internationale Sonnenfleckenzahl	029 - Basierend auf 22 Stationen

Zusammenfassung auffälliger Ereignisse

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

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