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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Feb 17 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
17 Feb 2017	074	017
18 Feb 2017	074	021
19 Feb 2017	074	022

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. The solar wind near Earth is under the influence of a high speed stream by a positive coronal hole. In the past 24 hours, solar wind speed measured by DSCOVR rose from about 375 km/s to about 500 km/s, as the solar wind from the broader part of the coronal hole arrived at Earth. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 2 and 13 nT, with current values around 6 nT. There were a few short intervals with negative Bz, down to -9 nT. Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 4) were registered in the past 24 hours. Due to the influence of the high speed stream, quiet to active geomagnetic levels (K Dourbes < 5) are expected on February 17, 18 and 19, with possible minor storm episodes (K Dourbes = 5).

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 012, basierend auf 15 Stationen.

Solarindizes für den 16 Feb 2017

Wolf-Zahl Catania	025
10cm Solarflux	074
AK Chambon La Forêt	019
AK Wingst	008
Geschätzer Ap-Wert	008
Geschätzte internationale Sonnenfleckenzahl	012 - Basierend auf 35 Stationen

Zusammenfassung auffälliger Ereignisse

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

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