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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jul 27 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

Quiet conditions (<50% probability of C-class flares)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
27 Jul 2017	069	006
28 Jul 2017	069	003
29 Jul 2017	070	003

Bulletin

Solar activity was at very low levels, and is expected to remain so. The solar disk was spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux remained slightly above background levels.

Earth is exiting the high speed stream (HSS) from a positive polarity coronal hole (CH). Wind speed gradually decreased from 590 km/s to its current values near 450 km/s (DSCOVR). Bz oscillated between -4 and +3 nT until about 19UT, when it started a much smoother variation between -3 and +2 nT. The interplanetary magnetic field was mostly directed away from the Sun.

The geomagnetic field was at quiet levels. Mostly quiet geomagnetic conditions are expected, with a chance on an unsettled episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 16 Stationen.

Solarindizes für den 26 Jul 2017

Wolf-Zahl Catania	013
10cm Solarflux	069
AK Chambon La Forêt	012
AK Wingst	013
Geschätzer Ap-Wert	013
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 24 Stationen

Zusammenfassung auffälliger Ereignisse

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

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