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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2018 Apr 21 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
21 Apr 2018	073	018
22 Apr 2018	073	010
23 Apr 2018	072	006

Bulletin

Solar flaring activity is rather low. Catania sunspot group 78 (NOAA AR 2706) was source of several B-class flares during last 24 hours. As Catania sunspot group 78 continues to have beta configuration of its photospheric magnetic field, we might expect B-class flares and possibly also isolated C-class flares in the coming hours. No Earth directed CMEs were observed in the coronagraph images. The solar protons continue to be at the background level.

Earth is presently inside the fast solar wind (speed of about 610 km/s) associated with the equatorial coronal hole. The interplanetary magnetic field magnitude is about 6nT. As the solar wind speed is rather high, together with the longer intervals of the Bz component of the IMF it might induce disturbed geomagnetic conditions in the coming hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 026, basierend auf 24 Stationen.

Solarindizes für den 20 Apr 2018

Wolf-Zahl Catania	015
10cm Solarflux	073
AK Chambon La Forêt	044
AK Wingst	040
Geschätzer Ap-Wert	041
Geschätzte internationale Sonnenfleckenzahl	016 - Basierend auf 36 Stationen

Zusammenfassung auffälliger Ereignisse

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

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