Het archief bekijken van donderdag 28 augustus 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Aug 28 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

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

Zonnevlekkengebieden en zonnevlammen

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.

Coronale massa uitstoten

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

Zonnewind

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.

Geomagnetisme

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

Proton flux niveaus

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.

Elektronenfluxen in geostationaire baan

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.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 209, gebaseerd op 10 stations.

Zon indexen voor 27 Aug 2025

Wolfgetal Catania	173
10cm zonneflux	226
AK Chambon La Forêt	016
AK Wingst	009
Geschatte Ap	009
Geschat internationaal zonnevlekkengetal	207 - Gebaseerd op 20 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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