Archiv von Sonntag, 30 Juli 2017 anzeigen

Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jul 30 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

C-class flares expected, (probability >=50%)

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
30 Jul 2017	075	008
31 Jul 2017	079	015
01 Aug 2017	080	006

Bulletin

Solar activity was at very low levels. Sunspot group NOAA 2669 (Catania 40) is visible at location N17W30. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Mostly quiet flaring conditions are expected, with an increasing chance on a C-class flare from returning active region NOAA 2665.

Solar wind speed decreased further from about 430 to 370 km/s. Bz oscillated between -3 and +4 nT (DSCOVR). The interplanetary magnetic field was mostly directed away from the Sun. A small negative equatorial coronal hole (CH) transited the central meridian from 27 till 29 July.

The geomagnetic field was at quiet levels with a single unsettled episode recorded at Dourbes during the 15-18UT interval. Quiet to unsettled geomagnetic conditions are expected until the arrival of the particle stream associated with the aforementioned CH, which may start influencing the earth environment late on 30 or on 31 July, possibly resulting in an active episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 013, basierend auf 17 Stationen.

Solarindizes für den 29 Jul 2017

Wolf-Zahl Catania	///
10cm Solarflux	070
AK Chambon La Forêt	007
AK Wingst	006
Geschätzer Ap-Wert	004
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 25 Stationen

Zusammenfassung auffälliger Ereignisse

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

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