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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2016 Apr 02 1230 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
02 Apr 2016	081	015
03 Apr 2016	080	034
04 Apr 2016	080	021

Bulletin

No solar flares were observed over the last 24 hours. Two small sunspots developed during the period, but were gone by about 09UT. NOAA 2526 remained quiet. Filament eruptions were observed on 1 April between 12-14UT (southwest limb) and 16-17UT (south of NOAA 2526), but no earth- directed coronal mass ejections (CMEs) were observed. The x-ray background flux has been below the B1 level since noon of 30 March.

Quiet conditions are expected to continue.

Solar wind speed initially decreased further from about 400 km/s to values near 330 km/s. Around 08UT, a gradual increase set in to speeds near 360 km/s by the end of the period, coinciding with a gradual increase in wind density. Bz varied between -3 and +4 nT. The interplanetary magnetic field was mostly directed away from the Sun. Geomagnetic conditions were quiet. A somewhat elongated negative coronal hole between latitudes +10 and +30 degrees has transited the central meridian and may start influencing the earth environment from 4 April onwards.

Mostly quiet to unsettled geomagnetic conditions are expected until the arrival later today or tomorrow (3 April) of a sector boundary and the co- rotating interaction region ahead of the wind stream from the small negative equatorial coronal hole. This may result in minor geomagnetic storming on 2 and 3 April, with a small chance on moderate storming.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 012, basierend auf 13 Stationen.

Solarindizes für den 01 Apr 2016

Wolf-Zahl Catania	023
10cm Solarflux	082
AK Chambon La Forêt	///
AK Wingst	003
Geschätzer Ap-Wert	003
Geschätzte internationale Sonnenfleckenzahl	013 - Basierend auf 25 Stationen

Zusammenfassung auffälliger Ereignisse

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

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