Archiv von Samstag, 29 Juli 2017 anzeigen

Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Jul 29 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
29 Jul 2017	071	003
30 Jul 2017	075	009
31 Jul 2017	079	015

Bulletin

Solar activity was at very low levels, and is expected to remain so. A barely visible sunspot group (Catania 40) is at location N19W15. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux is near background levels.

Old active region NOAA 2665 is expected to round the east limb on 31 July and may gradually increase the chance on a C-class flare already on 30 July. Also the 10.7 cm radio flux is expected to increase well before the region will actually become visible.

Solar wind speed varied steadily between 470-420 km/s, showing a generally declining trend (DSCOVR). Bz oscillated between -5 and +5 nT during the entire period. 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 to unsettled levels and is expected to remain so until the arrival of the particle stream associated with the aforementioned CH, which may start influencing the earth environment on 30 or 31 July, with active geomagnetic conditions possible.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 21 Stationen.

Solarindizes für den 28 Jul 2017

Wolf-Zahl Catania	012
10cm Solarflux	070
AK Chambon La Forêt	013
AK Wingst	010
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 20 Stationen

Zusammenfassung auffälliger Ereignisse

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

Alle Zeiten in UTC

<< Zum Tagesübersicht