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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jan 29 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
29 Jan 2017	079	003
30 Jan 2017	077	005
31 Jan 2017	076	019

Bulletin

Solar activity was low, with an isolated C2.8 flare produced by spotless region NOAA 2627 near the west limb on 28 January at 21:09UT. A new active region rotated over the east limb with only a few tiny spots. NOAA 2628 and NOAA 2629 were quiet. 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 small chance on a C-class event.

Solar wind speed declined from 540 km/s to values around 460 km/s under the waning influence of the coronal hole's high speed stream (HSS). Bz fluctuated between -4 and +4 nT. The interplanetary magnetic field was mostly directed away from the Sun. A negative CH is transiting the central meridian (CM) and may start influencing the earth environment around 31 January, probably preceded by a sector boundary crossing (SBC).

The geomagnetic field was at quiet (Dourbes) to unsettled (Kp) levels. Mostly quiet to unsettled conditions are expected till the arrival of the SBC and the CIR/HSS structure from the negative CH, when active episodes may become possible.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 033, basierend auf 09 Stationen.

Solarindizes für den 28 Jan 2017

Wolf-Zahl Catania	///
10cm Solarflux	079
AK Chambon La Forêt	016
AK Wingst	010
Geschätzer Ap-Wert	010
Geschätzte internationale Sonnenfleckenzahl	029 - Basierend auf 27 Stationen

Zusammenfassung auffälliger Ereignisse

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

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