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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Apr 12 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
12 Apr 2017	075	010
13 Apr 2017	076	010
14 Apr 2017	077	008

Bulletin

Solar activity was at low levels during the period. The strongest event was a B1.4 flare peaking at 19:45 UT yesterday. This flare was produced by NOAA 2650 (McIntosh: Cao; Mag.Type: Beta). No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels. B-class flaring is expected, with a small chance on an isolated C-class flare. Solar wind speed increased from about 420 km/s to values around 490 km/s (00UT, 12/04), but then decreased again till 450 km/s. The total interplanetary magnetic field (IMF) strength, as recorded by the DSCOVR satellite, has been around 5 nT. Bz fluctuated between -4.5 and +4 nT, being mostly negative. Solar wind parameters are expected to decline further today. The geomagnetic field was at quiet to unsettled levels, Kp NOAA index: 2-3, local K Dourbes index: 1-3. Quiet to unsettled conditions are expected, with a chance on an active episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 020, basierend auf 20 Stationen.

Solarindizes für den 11 Apr 2017

Wolf-Zahl Catania	015
10cm Solarflux	075
AK Chambon La Forêt	023
AK Wingst	015
Geschätzer Ap-Wert	014
Geschätzte internationale Sonnenfleckenzahl	014 - Basierend auf 30 Stationen

Zusammenfassung auffälliger Ereignisse

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

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