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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Sep 19 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
19 Sep 2017	072	005
20 Sep 2017	073	006
21 Sep 2017	076	006

Bulletin

Over the past 24 hours the solar activity was very low with no flaring activity recorded. The Catania sunspot group 55 (NOAA active region 2680) is the only present region on the disc, and is unlikely to produce any flaring activity. We expect the solar activity to remain quiet until the returning region (Catania sunspot group 49 / NOAA active region 2676) will come from behind the East solar limb by the end of the day.

No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

Solar wind speed starts a slow overall decline from about 700 km/s to 500 km/s. The interplanetary magnetic field magnitude returned to its nominal 3-6 nT range with the Bz component fluctuating between -4 and 4 nT. The solar wind is expected to further recover to nominal conditions over the next days.

Geomagnetic conditions were quiet to active (local K Dourbes 1-4, NOAA Kp 1-3) and are expected to remain quiet to unsettled over the next days.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 012, basierend auf 21 Stationen.

Solarindizes für den 18 Sep 2017

Wolf-Zahl Catania	013
10cm Solarflux	072
AK Chambon La Forêt	026
AK Wingst	021
Geschätzer Ap-Wert	027
Geschätzte internationale Sonnenfleckenzahl	014 - Basierend auf 35 Stationen

Zusammenfassung auffälliger Ereignisse

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

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