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Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2026 Feb 05 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

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

	10cm flux	Ap
05 Feb 2026	167	031
06 Feb 2026	165	012
07 Feb 2026	163	007

Zonnevlekkengebieden en zonnevlammen

A total of 9 numbered sunspot groups were identified on the disk over the past 24 hours. The activity, including an X-class flare, was again driven by SIDC Sunspot Group 784 (NOAA Active Region 4366), currently located at N13W06 with a Beta-Gamma-Delta magnetic configuration. This region has stopped growing but remains very active. The largest flare it produced was an X4.2 one, peaking at 12:13 UTC on February 4. Solar flaring activity is expected to be high over the next 24 hours, with M-class flares very likely and X-class flares possible.

Coronale massa uitstoten

No Earth directed CMEs have been detected in the last 24 hours.

Coronale gaten

A small coronal hole is on the western hemisphere since yesterday, SIDC Coronal Hole 136 (equatorial coronal hole with a negative polarity). A larger one, SIDC Coronal Hole 142 (mid-latitude coronal hole with a negative polarity), in the northern hemisphere, will cross the central meridian today.

Zonnewind

A shock arrived at the L1 point, observed in ACE data at 14:20 UTC. The interplanetary magnetic field increased from 11 to 22 nT, and the solar wind speed rose from 320 to 400 km/s. The shock was followed by an extended sheath region lasting until 01:00 UTC on 5 February. After that, the ejecta associated with the 2 February CME was observed, showing a rotation of the magnetic field components, with the total interplanetary magnetic field reaching up to 18 nT, Bz dropping to -15 nT, and speeds peaking at 580 km/s. The event is still ongoing, so similarly disturbed conditions are expected over the next 24 hours.

Geomagnetisme

Geomagnetic conditions reached minor storm levels (Kp and K_Bel up to 5), due to the ICME arrival corresponding to the February 2 CME. Unsettled to active conditions can be expected for the next 24 hours.

Proton flux niveaus

The greater than 10 MeV proton flux remained below the 10 pfu threshold in the last 24 hours. SIDC Sunspot Group 784 (NOAA Active Region 4366) is on the western hemisphere, and thus a warning condition for elevated fluxes reaching the Earth has been issued.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux as measured by GOES 18 and GOES 19 has been mostly below the 1000 pfu threshold for most of the last 24 hours. Similar conditions can be expected for the next 24 hours. The 24-hour electron fluence was at moderate levels and is expected to remain so.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 136, gebaseerd op 10 stations.

Zon indexen voor 04 Feb 2026

Wolfgetal Catania	///
10cm zonneflux	167
AK Chambon La Forêt	027
AK Wingst	012
Geschatte Ap	012
Geschat internationaal zonnevlekkengetal	155 - Gebaseerd op 15 stations

Overzicht opvallende gebeurtenissen

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

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