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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jan 26 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
26 Jan 2017	084	008
27 Jan 2017	084	034
28 Jan 2017	083	018

Bulletin

Solar activity was very low. NOAA 2629 was responsible for the flurry of B-class flares observed, including a B8 flare peaking at 21:28UT - the strongest event of the period. A small filament eruption occurred in between NOAA 2628 and NOAA 2627 around 07:00UT. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Mostly quiet flaring conditions are expected, with a chance on a C-class event in particular from NOAA 2629.

Solar wind speed was steady between 360 and 330 km/s (DSCOVR) until 07:12UT when a small shock was observed in the solar wind. Wind speed suddenly increased from 335 km/s to values around 375 km/s. Density doubled from 8 to 16 particles per cm3, and magnetic field strength jumped from 6 to 10 nT. Bz fluctuated between -8 and +11 nT from 08UT onwards, ending the period at -8 nT. The interplanetary magnetic field was mostly directed away from the Sun. The origin of the small shock is currently being researched.

The geomagnetic field was at quiet to unsettled levels. It is expected to remain so until the arrival of the co-rotating interaction region (CIR) and associated high speed stream (HSS) from the equatorial coronal hole later today or tomorrow. This may result in active to minor storming episodes.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 038, basierend auf 14 Stationen.

Solarindizes für den 25 Jan 2017

Wolf-Zahl Catania	064
10cm Solarflux	085
AK Chambon La Forêt	005
AK Wingst	005
Geschätzer Ap-Wert	004
Geschätzte internationale Sonnenfleckenzahl	046 - Basierend auf 15 Stationen

Zusammenfassung auffälliger Ereignisse

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

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