Het archief bekijken van woensdag 15 oktober 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Oct 15 1239 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
15 Oct 2025	160	011
16 Oct 2025	165	029
17 Oct 2025	170	012

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was moderate over the past 24 hours with 6 M-class flares recorded. The largest flare was an M4.8 flare (SIDC Flare 5780) peaking on October 15 at 04:15 UTC, which was produced by SIDC Sunspot Group 639 (NOAA Active Region 4246). This region continued to increase in size and complexity and was responsible for most of the M-class flaring activity. SIDC Sunspot group 621 (NOAA Active region 4248) also increased in complexity and produced an M2.0 flare (SIDC Flare 5759) peaking on October 14 at 12:47 UTC. The remaining regions on disk were mostly quiet and either stable or in decay. The solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares expected and a chance for X-class flares.

Coronale massa uitstoten

No new Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery.

Zonnewind

The solar wind conditions reflected the ongoing waning influence of the high-speed stream associated with the large equatorial coronal hole that first began to cross the central meridian on October 08 (SIDC Coronal Hole 116). The solar wind speed gradually decreased from 650 km/s to around 500 km/s. The interplanetary magnetic field ranged between 1 and 6 nT. Bz ranged between -4 nT and 5 nT. Over the next 24 hours the solar wind conditions may become enhanced from early on October 16, due to a possible CME arrival from the CME observed on October 12. Further disturbances may be expected late on October 16 due to the glancing blow from the CMEs observed on October 13.

Geomagnetisme

Geomagnetic conditions reached active conditions (Kp 4- ), due to the ongoing high speed stream influence. Locally, active conditions were observed (K Bel 3). Unsettled to active conditions are expected on October 15, with periods of minor storm conditions (Kp 5) possible from October 16 in response to the possible CME arrival.

Proton flux niveaus

The greater than 10 MeV proton flux was below the 10 pfu threshold over the past 24 hours. It is expected to remain below this threshold level over the next 24 hours. There is a small chance of an increase related to any high-level flaring, particularly from SIDC Sunspot Group 639 (NOAA Active Region 4246).

Elektronenfluxen in geostationaire baan

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

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 116, gebaseerd op 08 stations.

Zon indexen voor 14 Oct 2025

Wolfgetal Catania	172
10cm zonneflux	154
AK Chambon La Forêt	015
AK Wingst	008
Geschatte Ap	008
Geschat internationaal zonnevlekkengetal	125 - Gebaseerd op 19 stations

Overzicht opvallende gebeurtenissen

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

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