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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2019 Sep 20 1245 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
20 Sep 2019	067	006
21 Sep 2019	067	007
22 Sep 2019	067	007

Bulletin

Solar X ray flux remained below B level throughout the period. The Solar disk is spotless and X-ray flux is expected to remain at or below background levels.

A filament in the Southern hemisphere stretching from the central meridian towards the Eastern limb is seen to erupt in SDO/AIA 304 imagery from around 21:00UT. Corresponding STEREO/COR2 coronagraph data indicate a corresponding narrow CME may be Earth directed. SoHO/LASCO data do not show any clear signs of any (partial) halo CME but they are being analysed further in order to assess the possibility of an Earth directed component. There were otherwise no Earth-directed CMEs observed in coronagraph data.

An equatorial negative polarity coronal hole is about to cross the central meridian.

Proton levels were at background values and are expected to remain so.

Solar wind was nominal. Solar wind speed decreased from 380 km/s to 320 km/s. Total magnetic field was around 4nT. The magnetic field phi angle was mostly in the positive sector. Solar wind conditions are expected to remain nominal over the next 48 hours. Afterwards the influence of the negative polarity equatorial coronal hole is expected to increase solar wind conditions.

Geomagnetic conditions were quiet to unsettled (NOAA Kp 1-2 and local K Dourbes 0-3). Quiet geomagnetic conditions are expected the next 48 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 21 Stationen.

Solarindizes für den 19 Sep 2019

Wolf-Zahl Catania	000
10cm Solarflux	067
AK Chambon La Forêt	008
AK Wingst	004
Geschätzer Ap-Wert	005
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 29 Stationen

Zusammenfassung auffälliger Ereignisse

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

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