Het archief bekijken van donderdag 19 juni 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Jun 19 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
19 Jun 2025	137	014
20 Jun 2025	139	014
21 Jun 2025	141	011

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was at low levels over the past 24 hours. A total of 8 numbered sunspot groups were identified on the visible solar disk. The strongest activity was a C7.9 flare (SIDC Flare 4701), peak time 09:17 UTC on June 19. The flare was produced by SIDC Sunspot Group 523 (NOAA Active Region 4114), which remains the most complex region on disk, classified as magnetic type beta-gamma- delta. SIDC Sunspot Group 526 (NOAA Active Region 4117) which recently rotated from over the east limb is now classified as magnetic type beta- gamma. These two regions are responsible for most of the flaring activity over the past 24 hours. The remaining active regions on the visible disk have been simple and/or quiet. Solar flaring activity is expected to be at moderate levels over the next 24 hours with likely M-class flares.

Coronale massa uitstoten

No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery over the past 24 hours.

Coronale gaten

A large positive polarity coronal hole (SIDC Coronal Hole 104) continues to reside on the central meridian. This is a mid-latitude southern coronal hole covering a large longitudinal range which first crossed the central meridian on June 11. A mild high speed stream emanating from it is expected to continue influencing the Earth over the next days.

Zonnewind

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) were under the continuous influence of a high speed stream from a large positive polarity coronal hole, part of which still resides on the central meridian. The interplanetary magnetic field (B) was enhanced with a maximum value of 10.7 nT and a minimum Bz of -8 nT. The solar wind speed reached up to 600 km/s. The B field phi angle was predominantly in the positive sector (directed away from the Sun). The solar wind conditions are expected to continue to be under the influence of a high speed stream over the next days.

Geomagnetisme

The geomagnetic conditions over the past 24 hours were quiet to active. Quiet to active geomagnetic conditions are expected for the next 24 hours.

Proton flux niveaus

Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain at nominal levels over the next days.

Elektronenfluxen in geostationaire baan

The greater than 10 MeV GOES 18 electron flux briefly exceeded the 1000 pfu threshold over the last 24 hours and is expected to exceed the threshold again over the next 24 hours. The 24-hour electron fluence was at the nominal levels and is expected to be at the border of nominal to moderate levels in the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 132, gebaseerd op 21 stations.

Zon indexen voor 18 Jun 2025

Wolfgetal Catania	128
10cm zonneflux	137
AK Chambon La Forêt	022
AK Wingst	018
Geschatte Ap	018
Geschat internationaal zonnevlekkengetal	131 - Gebaseerd op 32 stations

Overzicht opvallende gebeurtenissen

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

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