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Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2026 Aug 12 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
12 Aug 2026	098	010
13 Aug 2026	104	006
14 Aug 2026	106	018

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was low over the past 24 hours, with only four C-class flares identified. The newly-numbered SIDC Sunspot Group (SG) 940 (NOAA Active Region [AR] 4507, Beta magnetic configuration) and SIDC SG 941 (NOAA AR 4508, Alpha magnetic configuration) produced two C-class flares each. The brightest flare of the past 24 hours was SIDC flare 8348, a C2 emitted from SIDC SG 940 and peaked on 22 Aug at 23:04 UTC. More C-class flaring activity is expected in the next 24 hours.

Coronale massa uitstoten

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Coronale gaten

SIDC Coronal Hole (CH) 174 is a northern, middle-latitude, elongated, irregular, positive polarity structure. It started crossing the solar central meridian on 10 Aug, but it was considered too weak to cause a geo-effective High Speed Stream (HSS). However, the structure has intensify since and it is now likely that it is associated with a HSS capable of reaching the Earth. As SIDC CH 174 it still crossing the central meridian, the said HSS is considered to be Earth-directed and to arrive at Earth on 14 Aug.

Zonnewind

The glancing blow that arrived on 11 Aug at 10:34 UTC has now subsided and the Solar Wind (SW) conditions are now closer to a typical slow SW regime. The SW speed marginally increased from 420 to 460 km/s, the interplanetary magnetic field (B) ranged dropped to 5 nT, and its North- South component (Bz) varies between -5 and 3 nT. Similar conditions are expected to register in the next 24 hours.

Geomagnetisme

The geomagnetic conditions of the past 24 hours ranged between quiet and unsettled levels both globally and locally (NOAA Kp 1+ to 3+ and K BEL 2 to 3). Similar conditions are expected in the next 24 hours.

Proton flux niveaus

The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at nominal levels over the past 24 hours and is likely to remain so in the next 24 hours.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux, as measured by GOES 19, was below the 1000 pfu alert threshold for past 24 hours. It is expected to remain at the same levels in the next 24 hours. The electron fluence was at normal levels in the past 24 hours and it is expected to remain at the same levels in the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 074, gebaseerd op 23 stations.

Zon indexen voor 11 Aug 2026

Wolfgetal Catania	///
10cm zonneflux	096
AK Chambon La Forêt	016
AK Wingst	011
Geschatte Ap	009
Geschat internationaal zonnevlekkengetal	044 - Gebaseerd op 29 stations

Overzicht opvallende gebeurtenissen

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

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