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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Nov 18 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
18 Nov 2017	076	009
19 Nov 2017	077	014
20 Nov 2017	076	013

Bulletin

There are presently 2 numbered sunspot groups on the visible side of the solar disc, Catania sunspot group 63 (NOAA AR 2687) and group 64 (NOAA AR 2688). Solar flaring activity remains to be low without C-class flares reported. We expect such a low flaring activity to persist, isolated low C-class flares are possible but not very probable (probability of only about 10%). There were no Earth directed CMEs reported, and the solar protons remained at background level. The solar wind speed is presently about 410 km/s and the interplanetary magnetic field magnitude is about 4 nT. The fast solar wind associated with the large equatorial coronal hole (reached central meridian in the early morning of November 16) is expected to arrive at the Earth in the afternoon of November 19. The arrival of this fast flow might be preceded with the solar wind speed increase expected to start later today (associated with the low latitude extension of the southern polar coronal hole which reached central meridian in the late evening of November 13). The geomagnetic conditions are presently quiet, we expect unsettled to active geomagnetic conditions tomorrow due to the arrival of the fast solar wind.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 015, basierend auf 12 Stationen.

Solarindizes für den 17 Nov 2017

Wolf-Zahl Catania	031
10cm Solarflux	076
AK Chambon La Forêt	008
AK Wingst	004
Geschätzer Ap-Wert	004
Geschätzte internationale Sonnenfleckenzahl	023 - Basierend auf 32 Stationen

Zusammenfassung auffälliger Ereignisse

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

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