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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Oct 07 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
07 Oct 2017	081	005
08 Oct 2017	078	003
09 Oct 2017	075	003

Bulletin

Solar activity was at very low levels. NOAA 2683 (Catania 57) produced all of the low-level B-class flaring during the period, a B9.8 flare peaking on 06 October at 16:34UT being the strongest. It was also the source of a Long Duration B4.6 flare peaking at 00:28UT. Eruptive activity to the north and northwest of NOAA 2682 (Catania 56; now beyond the Sun's west limb) resulted in 2 coronal mass ejections (CMEs) observed by SOHO/LASCO C2 at resp. 09:12UT and 12:36UT on 06 October. None of the observed CMEs had an earth-directed component. The greater than 10 MeV proton flux was at nominal levels.

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

Solar wind was enhanced, probably influenced by the weak particle stream from the small negative equatorial coronal hole (CH). Solar wind speed reached a maximum speed around 470 km/s (DSCOVR) at the beginning of the period, gradually declining to its current values near 410 km/s. Bz oscillated between -5 and +6 nT. The interplanetary magnetic field was mostly directed towards the Sun. The extension of a positive polar CH started its transit of the Central Meridian early on 07 October and may influence the earth environment around 10-11 October.

The geomagnetic field was at quiet levels. Quiet to unsettled conditions are expected, with a small chance on an isolated active interval.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 012, basierend auf 12 Stationen.

Solarindizes für den 06 Oct 2017

Wolf-Zahl Catania	026
10cm Solarflux	084
AK Chambon La Forêt	012
AK Wingst	010
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	025 - Basierend auf 33 Stationen

Zusammenfassung auffälliger Ereignisse

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

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