Het archief bekijken van dinsdag 11 augustus 2026

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2026 Aug 11 1245 UTC

SIDC Prognose

Zonnevlammen

Quiet conditions (<50% probability of C-class flares)

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
11 Aug 2026	094	010
12 Aug 2026	092	008
13 Aug 2026	090	004

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was low over the past 24 hours, with only a C2 flare identified (SIDC flare 8345). It was produced by SIDC Sunspot Group (SG) 938 (NOAA Active Region [AR] 4505, Beta magnetic configuration) that currently rotates behind the limb. A yet- unnumbered SG/AR is rotating into view, but so far does not appear complex. As such, the change of a C-class flare in the next 24 hours is below 50%.

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 in the last 24 hours, but due to its relatively small size and irregular shape, it is not likely to have a significant effect on Earth.

Zonnewind

The Solar Wind (SW) conditions of the past 24 hours featured a slow SW regime until the arrival of a glancing blow on 11 Aug at 10:34 UTC. Until this event, the SW speed dropped from 420 to 320 km/s, the interplanetary magnetic field (B) ranged between 4 and 6 nT, and its North- South component (Bz) varied from -3 to 5 nT. However, the glancing blow (associated with SIDC CME 705) increased the SW speed back to 420 km/s, the B to 10 nT, and the Bz dropped as low as -7 nT. The current disturbance is expected to last less than 24 hours and its intensity is estimated to remain roughly at the present levels.

Geomagnetisme

The geomagnetic conditions of the past 24 hours were at quiet levels both globally and locally (NOAA Kp 0+ to 2- and K BEL 1 to 2) until the arrival of a glancing blow on 11 Aug at 10:34 UTC. However, the event had so far a very minor effect, as NOAA Kp remained at 2 and K BEL increased to 3. In the next 24 hours unsettled to active conditions are expected both locally and globally.

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: 044, gebaseerd op 23 stations.

Zon indexen voor 10 Aug 2026

Wolfgetal Catania	///
10cm zonneflux	095
AK Chambon La Forêt	007
AK Wingst	006
Geschatte Ap	005
Geschat internationaal zonnevlekkengetal	039 - Gebaseerd op 27 stations

Overzicht opvallende gebeurtenissen

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

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