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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2016 Jan 25 1239 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
25 Jan 2016	104	004
26 Jan 2016	103	009
27 Jan 2016	104	007

Bulletin

Over the past 24 hours solar activity has been low. Several C-class flares have been detected. The most energetic flares were C1.4 class flares, produced by NOAA Active Region (AR) 2488. There is currently a large polar coronal hole rotating into the Western hemisphere which may increase geo-activity over the coming days. No Earth directed Coronal Mass Ejections (CMEs) have been detected. A currently unnamed region on the East solar limb produced a small CME around 12:00 UT yesterday (24-Jan-2016), the CME is not believed to be geo-effective. Solar activity is expected to remain low over the next 24 hours with the possibility of C-class flares, and the small region on the East limb producing further eruptions. The solar wind speed has been steadily decreasing over the past 24 hours from 500 km/s to 410 km/s. The total magnetic field strength remained around 5 nT. However, it peaked around 8 nT between 17:00 and 19:00 UT yesterday. The Bz has remained around 0 nT, but also fluctuated between 17:00 and 19:00 UT, reaching values of +5 and -5 nT. Geomagnetic conditions ranged between Kp index 1-4 (NOAA) and local K index 0-4 (Dourbes) over the past 24 hours, with activity peaking (Kp = 4; K =4) around 19:00 UT, coinciding with the fluctuating field. A low latitude section of a large polar coronal hole has rotated into the Western hemisphere and the resulting high-speed stream (HSS) may enhance solar wind speeds and increase geo-activity early tomorrow morning.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 064, basierend auf 19 Stationen.

Solarindizes für den 24 Jan 2016

Wolf-Zahl Catania	///
10cm Solarflux	104
AK Chambon La Forêt	013
AK Wingst	012
Geschätzer Ap-Wert	011
Geschätzte internationale Sonnenfleckenzahl	045 - Basierend auf 14 Stationen

Zusammenfassung auffälliger Ereignisse

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

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