Archiv von Sonntag, 17 Mai 2015 anzeigen

Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2015 May 17 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
17 May 2015	126	013
18 May 2015	122	021
19 May 2015	118	010

Bulletin

No C-class flares were observed. NOAA 2339 is quietly rounding the west limb. The 5 other sunspot regions are small and magnetically simple. Various filament eruptions were observed, most notably a filament east of NOAA 2348 that erupted around 07:00UT. Based on currently available coronagraphic imagery, none of the related coronal mass ejections (CMEs) had an earth-directed component.

There's still a chance for an isolated C-class flare.

Solar wind speed decreased further from about 430 km/s and is currently ranging between 360 and 400 km/s. Bz varied between -4 and +5 nT. A sector boundary crossing was observed at 04:10-04:20UT, with the direction of the interplanetary magnetic field abruptly turning from toward to away from the Sun. Quiet to unsettled geomagnetic conditions were observed.

The arrival of the 13 May CME and the high speed stream from the recurrent positive polarity coronal hole are expected for later today or 18 May. This may result in active conditions, with a possibility on a minor storming episode.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 059, basierend auf 17 Stationen.

Solarindizes für den 16 May 2015

Wolf-Zahl Catania	///
10cm Solarflux	131
AK Chambon La Forêt	009
AK Wingst	006
Geschätzer Ap-Wert	005
Geschätzte internationale Sonnenfleckenzahl	071 - Basierend auf 18 Stationen

Zusammenfassung auffälliger Ereignisse

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

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