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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 Jul 26 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
26 Jul 2015	098	008
27 Jul 2015	103	008
28 Jul 2015	109	012

Bulletin

There are currently 2 sunspot groups visible on the solar disk. NOAA 2389 is small and produced only B-class flares. NOAA 2390 shows some mixed magnetic polarity mixing in its asymmetric trailing portion. No C-class flares were recorded. Two significant coronal mass ejections (CMEs) were observed on 25 July starting resp. at 14:48UT (northwest) and 19:24UT (northeast), but they were both backside events. No earth-directed CMEs were observed.

There's a reasonable chance on C-class flares.

Solar wind speed varied mostly between 390 and 450 km/s, while Bz fluctuated between -6 and +6 nT under the influence from a moderate-speed stream from the northern coronal hole (CH) starting around 18:00UT on 25 July. Mostly quiet to unsettled geomagnetic conditions were observed. The wind stream from a small equatorial positive coronal hole (CH) may influence the earth environment on 28-29 July.

Mostly quiet to unsettled geomagnetic conditions are expected, with a small chance on an active episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 043, basierend auf 15 Stationen.

Solarindizes für den 25 Jul 2015

Wolf-Zahl Catania	///
10cm Solarflux	094
AK Chambon La Forêt	015
AK Wingst	011
Geschätzer Ap-Wert	010
Geschätzte internationale Sonnenfleckenzahl	036 - Basierend auf 20 Stationen

Zusammenfassung auffälliger Ereignisse

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

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