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Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Jun 25 1239 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 Jun 2025	119	019
26 Jun 2025	117	035
27 Jun 2025	115	027

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C3.1 flare (SIDC Flare 4748) peaking on June 24 at 15:45 UTC, which was produced by SIDC Sunspot Group 526 (NOAA Active Region 4117). A total of 6 numbered sunspot groups were identified on the disk over the past 24 hours. Five sunspot groups (SIDC Sunspot Groups 526, 527, 530, 532, and 533) have beta magnetic configurations. Almost all C-class flarings were produced by SIDC Sunspot Groups 527 and 526 (NOAA ARs 4118 and 4117). The solar flaring activity is expected to be at low to moderate levels over the next 24 hours with C-class flares expected, M-class flares probable, and a small chance of X-class flares.

Coronale massa uitstoten

A narrow coronal mass ejection (CME) was observed on SE limb in SOHO/LASCO-C2 images around 16:24 UTC on Jun 24 (as detected by CACTUS tool). This CME was associated with flaring activites from the SIDC Sunspot Groups 527 and 526 (NOAA ARs 4118 and 4117), and it is not expected to arrive at the Earth. No other Earth-directed CMEs were detected in the available coronagraph observations during last 24 hour.

Zonnewind

Earth was under the influence of sector boundary crossing and was possibly followed by the solar wind from the SIDC Coronal Hole 116 (negative polarity) which started to cross the central meridian on Jun 21. The solar wind speed ranged between 390 km/s and 480 km/s. The North-South component (Bz) ranged between -6 and 8 nT. The interplanetary magnetic field ranged between 1 nT and 10 nT. Enhanced solar wind parameters are expected in the next 24 hours with the further arrival of high speed streams from the same coronal hole.

Geomagnetisme

Geomagnetic conditions were at quiet to unsettled conditions (NOAA Kp 1 and K_BEL 1 to 3) both globally and locally during the past 24 hours. We expect unsettled to minor storm conditions (K 3 to 5) in the next 24 hours with the further arrival of high speed streams from the SIDC Coronal Hole 116 (negative polarity) which started to cross the central meridian on Jun 21.

Proton flux niveaus

The greater than 10 MeV GOES proton flux was below the threshold level over the past 24 hours and it is expected to remain so for the next 24 hours.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux, as measured by GOES-19, mostly remained below the threshold level, except from 14:30 UTC to 17:30 UTC on Jun 24, when it fluctuated around the threshold level. The greater than 2 MeV electron flux, as measured by GOES-18 satellite, reached above the threshold level at 16:00 UTC on Jun 24 and dropped below it at 00:45 UTC on Jun 25. In the next 24 hours, the electron flux may briefly exceed the threshold level again. The 24h electron fluence is presently at normal level, and it is expected to remain so in the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 092, gebaseerd op 20 stations.

Zon indexen voor 24 Jun 2025

Wolfgetal Catania	089
10cm zonneflux	120
AK Chambon La Forêt	013
AK Wingst	013
Geschatte Ap	011
Geschat internationaal zonnevlekkengetal	080 - Gebaseerd op 24 stations

Overzicht opvallende gebeurtenissen

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

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