Het archief bekijken van zondag 31 augustus 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Aug 31 1232 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
31 Aug 2025	222	007
01 Sep 2025	222	060
02 Sep 2025	222	023

Zonnevlekkengebieden en zonnevlammen

A total of 10 numbered sunspot groups were identified on the disk over the past 24 hours. Three M-class flares were detected in the last 24 hours. The largest flare was a M2.7 flare (SIDC Flare 5391) peaking on August 30 at 20:02 UTC, which was produced by SIDC Sunspot Group 617 (NOAA Active Region 4199). Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares possible and a chance for X-class flares.

Coronale massa uitstoten

A halo CME erupted on 30 August, first seen at 20:12 UT on SOHO LASCO C2. The CME was associated with an M2.7 flare from SIDC Sunspot Group 617 (NOAA 4199), located at N04E01 (almost at disk center). This CME is Earth directed, preliminary speeds calculation estimates are about 1600 km/s, with an arrival time around 14:00 UT on 1 September. These values may be updated in the coming hours as the result of ongoing analysis.

Coronale gaten

SIDC Coronal Hole 122 (equatorial coronal hole with a negative polarity) is in the western hemisphere and its associated high speed solar wind is expected today.

Zonnewind

The solar wind speed is starting to increase (currently at 450 km/s) as a result of the expected arrival from the high speed solar wind from SIDC Coronal Hole 122. This is a narrow coronal hole, so the associated high speed stream in the coming hours is expected to be short and mild in terms of speed.

Geomagnetisme

Geomagnetic conditions have been quiet to unsettled (Kp and K_Bel between 0 and 3). Active conditions can be expected for today and up to major storm conditions tomorrow when the CME from 30 August is expected to arrive.

Proton flux niveaus

The greater than 10 MeV proton flux has been below the 10 pfu threshold in the last 24 hours. 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: 196, gebaseerd op 17 stations.

Zon indexen voor 30 Aug 2025

Wolfgetal Catania	///
10cm zonneflux	317
AK Chambon La Forêt	014
AK Wingst	006
Geschatte Ap	007
Geschat internationaal zonnevlekkengetal	196 - Gebaseerd op 24 stations

Overzicht opvallende gebeurtenissen

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

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