Het archief bekijken van zaterdag 23 augustus 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Aug 23 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
23 Aug 2025	125	008
24 Aug 2025	126	007
25 Aug 2025	128	007

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was moderate over the past 24 hours, with 1 M-class flare identified. A total of 6 numbered sunspot groups were identified on the disk over the past 24 hours, all having alpha or beta magnetic configuration. The largest flare was a M1.7 flare (SIDC Flare 5188) peaking on August 22 at 18:51 UTC from a region behind the east-limb. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Coronale massa uitstoten

A halo Coronal Mass Ejection (CME) was detected in SOHO/LASCO-C3 data from 17:12 UTC Aug 22, and will be further analysed when more data become available. A partial halo CME reported by CACTus as launched on 22 Aug at 05:24 UTC is the combination of two CME which are not expected to become geo-effective.

Coronale gaten

The SIDC Coronal Hole 126 (mid-latitude coronal hole with a negative polarity) is crossing the central meridian. A high-speed stream from this coronal hole may enhance the solar wind environment near Earth on August 26.

Zonnewind

Slow solar wind conditions were recorded over the past 24 hours, with speed around 460 km/s. The interplanetary magnetic field was around 4 nT, with the Bz reaching a minimum value of -2 nT. Slow solar wind conditions are expected in the next 24 hours.

Geomagnetisme

Geomagnetic conditions were globally and locally quiet to unsettled (Kp 3 and K Bel 3). Quiet conditions are expected in the next 24 hours.

Proton flux niveaus

The greater than 10 MeV proton flux remained below the 10 pfu threshold and is expected to remain so over the next days.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold, and is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 071, gebaseerd op 10 stations.

Zon indexen voor 22 Aug 2025

Wolfgetal Catania	050
10cm zonneflux	136
AK Chambon La Forêt	013
AK Wingst	010
Geschatte Ap	010
Geschat internationaal zonnevlekkengetal	056 - Gebaseerd op 21 stations

Overzicht opvallende gebeurtenissen

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

Alle tijden in UTC

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