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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2025 Aug 28 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

M-class flares expected (probability >=50%)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
28 Aug 2025	226	007
29 Aug 2025	226	007
30 Aug 2025	226	007

Solaraktive Regionen und Flares

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C9.2 flare (SIDC Flare 5247) peaking on August 27 at 12:50 UTC, which was produced by SIDC Sunspot Group 617 (NOAA Active Region 4199). A total of 14 numbered sunspot groups were identified on the disk over the past 24 hours. Solar flaring activity is expected to be low to moderate over the next 24 hours, with C-class flares expected and a chance for M-class flares.

Koronaler Massenauswurf

No Earth-directed Coronal Mass Ejections (CMEs) have been observed in the last 24 hours.

Sonnenwind

The Earth is inside slow solar wind with speeds around 400 km/s and interplanetary magnetic fields of about 7 nT (directed towards the Sun, negative polarity). Similar conditions can be expected for the coming 24 hours.

Geomagnetismus

Geomagnetic conditions have been quiet to unsettled (Kp and B_Bel between 0 and 3). Similar conditions are expected for the next 24 hours.

Protonenflusswerte

The greater than 10 MeV proton flux returned to nominal levels (below the 10 pfu threshold) at 15:30 UT on 27 August. It is expected to remain at nominal levels.

Elektronenflüsse im geostationären Orbit

The greater than 2 MeV electron flux as measured by GOES 18 and 19 remained below the 1000 pfu alert threshold, similar conditions expected for the next 24 hours. The 24 h electron fluence was at normal levels and is expected to remain so.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 209, basierend auf 10 Stationen.

Solarindizes für den 27 Aug 2025

Wolf-Zahl Catania	173
10cm Solarflux	226
AK Chambon La Forêt	016
AK Wingst	009
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	207 - Basierend auf 20 Stationen

Zusammenfassung auffälliger Ereignisse

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

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