Het archief bekijken van woensdag 19 augustus 2026

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2026 Aug 19 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
19 Aug 2026	128	016
20 Aug 2026	130	029
21 Aug 2026	135	018

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C5.0 flare (SIDC Flare 8393), peaking at 04:54 UTC on August 19, from a region behind the east limb. There are currently four numbered active regions on the solar disk. SIDC Sunspot Group 940 (NOAA Active Region 4507, magnetic type beta-gamma-delta) is the most complex group and remained stable over the past 24 hours. SIDC Sunspot Groups 939 and 943 (NOAA Active Regions 4506 and 4510) are rotating across the west limb. The solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Coronale massa uitstoten

No Earth-directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery in the last 24 hours.

Zonnewind

Over the past 24 hours, the solar wind parameters reflected the onset of a high-speed stream associated with the negative polarity coronal hole (SIDC Coronal Hole 149), which crossed the central meridian early on August 16. Speed values were around 400 km/s at the beginning of the period and increased up to around 600 km/s. The interplanetary magnetic field values ranged between 6 nT and 16 nT. The Bz component varied between -10 nT and 12 nT. The interplanetary magnetic field angle was mostly in the negative sector. Enhanced solar wind conditions are expected to persist over the next 24 hours under the continued influence of the high-speed stream, with possible further enhancements later in the period due to a possible glancing blow arrival from the Coronal Mass Ejection (SIDC CME 710), observed in LASCO/C2 coronagraph imagery starting from around 19:48 UTC on August 16.

Geomagnetisme

Geomagnetic conditions globally were initially quiet to unsettled over the past 24 hours, before reaching minor storm levels between 18:00 UTC and 21:00 UTC on August 18 (NOAA Kp 5+ ) and again between 03:00 UTC and 06:00 UTC on August 19 (NOAA Kp 5). Locally, geomagnetic conditions were mostly quiet to active, with one interval of minor storm conditions between 20:00 UTC and 23:00 UTC on August 18 (K BEL 5). Mostly unsettled to active geomagnetic conditions are expected over the next 24 hours, with possible isolated minor storm intervals due to the continued influence of the high-speed stream from the negative polarity coronal hole (SIDC Coronal Hole 149) and a possible glancing blow arrival from SIDC CME 710.

Proton flux niveaus

The greater than 10 MeV proton flux was below the 10 pfu threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux measured by GOES 18 and GOES 19 was below the 1000 pfu threshold in the last 24 hours. The greater than 2 MeV electron flux is expected to be below the 1000 pfu threshold over the next 24 hours. The 24-hour electron fluence is presently at normal levels and is expected to remain so over the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 070, gebaseerd op 09 stations.

Zon indexen voor 18 Aug 2026

Wolfgetal Catania	///
10cm zonneflux	125
AK Chambon La Forêt	///
AK Wingst	025
Geschatte Ap	028
Geschat internationaal zonnevlekkengetal	072 - Gebaseerd op 15 stations

Overzicht opvallende gebeurtenissen

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

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