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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jun 28 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
28 Jun 2017	073	005
29 Jun 2017	072	008
30 Jun 2017	073	006

Bulletin

Solar activity was at very low levels during the period. NOAA 2664 is decaying and lost most sunspots of its northwestern portion. The region produced two low-level B-class flares. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected, with a tiny chance on an isolated C-class flare.

Solar wind speed declined slowly from about 470 to 450 km/s over the period. Bz fluctuated mostly between -2 and +3 nT. The interplanetary magnetic field was mostly directed away from the Sun.

The geomagnetic field was at quiet levels, and is expected to remain so. The particle stream from a small equatorial coronal hole may briefly enhance geomagnetic conditions on 29 or 30 June, with a small chance on an active episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 018, basierend auf 15 Stationen.

Solarindizes für den 27 Jun 2017

Wolf-Zahl Catania	020
10cm Solarflux	074
AK Chambon La Forêt	008
AK Wingst	006
Geschätzer Ap-Wert	005
Geschätzte internationale Sonnenfleckenzahl	020 - Basierend auf 26 Stationen

Zusammenfassung auffälliger Ereignisse

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

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