Het archief bekijken van dinsdag 25 november 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Nov 25 1232 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Minor storm expected (A>=30 or K=5)

Proton Flux monitor

Quiet

	10cm flux	Ap
25 Nov 2025	118	038
26 Nov 2025	118	031
27 Nov 2025	118	031

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was low over the past 24 hours, with few C-class flares recorded. The largest flare was a C1.5 flare (SIDC Flare 6193), peaking on November 24 at 22:03 UTC, associated with SIDC Sunspot Group 705 (NOAA Active Region 4290; magnetic type alpha). There are currently seven numbered active regions on the visible solar disk. SIDC Sunspot Group 706 (NOAA Active Region 4291; magnetic type beta-gamma) is the largest and most complex active region but remained quiet. The remaining active regions are relatively simple (magnetic type alpha or beta) and did not produce any significant flaring activity. 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

No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery over the past 24 hours.

Zonnewind

Over the past 24 hours, solar wind parameters (ACE and DSCOVR) reflected the influence of a high-speed stream (HSS), probably originating from a positive polarity coronal hole (SIDC Coronal Hole 128). The solar wind speed increased from 700 to 810 km/s. The interplanetary magnetic field reached values up to 13 nT before decreasing to around 7 nT. The southward component of the interplanetary magnetic field fluctuated between -10 nT and 8 nT. The magnetic field orientation was predominantly in the positive sector (field directed away from the Sun). Solar wind conditions are expected to remain slightly elevated over the next few days under the continued influence of the high-speed stream.

Geomagnetisme

Geomagnetic conditions reached minor storm levels (NOAA Kp = 5-, 5) between 00:00 and 03:00 UTC and betwen 06:00 and 09:00 UTC on November 25, due to the ongoing influence of a high-speed stream (HSS). Locally, minor storm conditions were observed over Belgium (K-Bel = 5) between 12:00 and 15:00 UTC on November 24. Mostly unsettled to active geomagnetic conditions are expected over the next 24 hours, with a chance of isolated minor storm periods due to the influence of the high-speed stream.

Proton flux niveaus

Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain at nominal levels over the next days.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux measured by GOES 18 and GOES 19 was below the 1000 pfu threshold. The greater than 2 MeV electron flux may exceed the 1000 pfu threshold over the next 24 hours. The 24-hour electron fluence was at normal levels and is expected to be at normal to moderate levels over the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 100, gebaseerd op 10 stations.

Zon indexen voor 24 Nov 2025

Wolfgetal Catania	119
10cm zonneflux	116
AK Chambon La Forêt	038
AK Wingst	022
Geschatte Ap	023
Geschat internationaal zonnevlekkengetal	104 - Gebaseerd op 17 stations

Overzicht opvallende gebeurtenissen

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

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