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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jan 28 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
28 Jan 2017	080	010
29 Jan 2017	079	007
30 Jan 2017	078	012

Bulletin

Solar activity was very low, NOAA 2629 producing the sole B-class flare of the period. A potentially active region is near the northeast limb. 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.

Earth remained under the influence of the coronal hole's high speed stream. Solar wind speed varied between 580 and 530 km/s, with Bz fluctuating between -4 and +4 nT. The interplanetary magnetic field was mostly directed away from the Sun. A negative coronal hole is at the central meridian (CM) and may start influencing the earth environment around 31 January, probably preceded by a sector boundary crossing (SBC) around 30 January.

The geomagnetic field was at quiet to active levels and is expected to evolve to quiet to unsettled levels, an active episode not excluded.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 028, basierend auf 17 Stationen.

Solarindizes für den 27 Jan 2017

Wolf-Zahl Catania	033
10cm Solarflux	080
AK Chambon La Forêt	020
AK Wingst	021
Geschätzer Ap-Wert	022
Geschätzte internationale Sonnenfleckenzahl	027 - Basierend auf 22 Stationen

Zusammenfassung auffälliger Ereignisse

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

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