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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 May 18 1231 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
18 May 2017	072	010
19 May 2017	072	020
20 May 2017	072	024

Bulletin

In the past 24 hours, no C flares were observed. Very low solar activity (no C flares) is expected in the next 24 hours. Solar wind speed measured by DSCOVR decreased from about 470 to 400 km/s in the past 24 hours. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 1 and 10 nT. Enhanced solar wind conditions are expected to start in the second half of May 19 due to the arrival of a high speed stream from a negative equatorial coronal hole. Quiet to unsettled geomagnetic conditions (K Dourbes between 2 and 3; NOAA Kp between 1 and 4) were registered in the past 24 hours. Quiet to unsettled levels are expected on May 18 and the first half of May 19, with a slight chance for active geomagnetic levels (K Dourbes = 4). Active (K Dourbes = 4) to minor storm conditions (K Dourbes = 5) are possible in the second half of May 19 and on May 20, due to the expected high speed stream.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 023, basierend auf 14 Stationen.

Solarindizes für den 17 May 2017

Wolf-Zahl Catania	044
10cm Solarflux	071
AK Chambon La Forêt	///
AK Wingst	009
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	012 - Basierend auf 31 Stationen

Zusammenfassung auffälliger Ereignisse

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

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