Het archief bekijken van dinsdag 19 augustus 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Aug 19 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
19 Aug 2025	116	019
20 Aug 2025	116	021
21 Aug 2025	118	012

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was moderate over the past 24 hours, with 1 M-class flare identified. A total of 7 numbered sunspot groups were identified on the disk over the past 24 hours, having all Alpha or Beta magnetic configuration. The largest flare was a M1.1 flare (SIDC Flare 5177) peaking on August 19 at 04:39 UTC, which was produced by SIDC Sunspot Group 572 (NOAA Active Region 4188), who has a Alpha magnetic configuration and was growing over the past 24 hours. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely and a small chance for M-class flares.

Coronale massa uitstoten

No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.

Zonnewind

The solar wind conditions at Earth were mainly slow over the past 24 hours. The speed started to increase slightly from 350km/s to 420 km/s. The interplanetary magnetic field reached a maximum of 16 nT with the Bz reaching a minimum value of -7 nT. The solar wind speed is expected to become enhanced in the next 24 hours, due to the potential arrival of the high-speed stream (HSS) associated with the SIDC coronal hole 116.

Geomagnetisme

Geomagnetic activity was quiet to unsettled over the past 24 hours both globally and locally. In response to the expected arrival of high-speed stream, geomagnetic conditions are expected to reach active level 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 measured by GOES 18 and GOES 19 has dropped below the 1000 pfu threshold. Electron flux levels are expected to remain below the 1000 pfu threshold over the next 24 hours. The 24-hour electron fluence returned to normal levels and is expected to remain so over the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 038, gebaseerd op 19 stations.

Zon indexen voor 18 Aug 2025

Wolfgetal Catania	049
10cm zonneflux	114
AK Chambon La Forêt	016
AK Wingst	011
Geschatte Ap	010
Geschat internationaal zonnevlekkengetal	057 - Gebaseerd op 32 stations

Overzicht opvallende gebeurtenissen

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

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