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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 Apr 27 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

Eruptive (C-class flares expected, probability >=50%)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
27 Apr 2015	115	005
28 Apr 2015	112	008
29 Apr 2015	110	012

Bulletin

Flaring activity was limited to one single C1.4 flare, originating from NOAA active region 2331 (Catania sunspot group 37), peaking at 20:57 UT. Flaring at the minor C level is expected over the next few days. A filament extending from N0E20 to N40E70 is currently crossing the solar disk. No Earth directed CMEs were observed. Earth is currently inside a slow solar wind (speed in the range 300-350 km/s). The magnitude of the interplanetary magnetic field (IMF) has slightly increased to 7nT, with currently a negative Bz. The phi angle was mainly positive, but turning to a negative orientation in the past few hours. The flow emanating from a recurrent equatorial coronal hole (currently crossing the central meridian) is expected to arrive within two to three days, which might result in an increased solar wind speed. Quiet to unsettled (local K=0 to 3) geomagnetic conditions were observed and are expected to remain so for the next 48 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 037, basierend auf 18 Stationen.

Solarindizes für den 26 Apr 2015

Wolf-Zahl Catania	///
10cm Solarflux	119
AK Chambon La Forêt	007
AK Wingst	002
Geschätzer Ap-Wert	002
Geschätzte internationale Sonnenfleckenzahl	042 - Basierend auf 17 Stationen

Zusammenfassung auffälliger Ereignisse

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

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