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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2025 Jun 20 1233 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
20 Jun 2025	135	011
21 Jun 2025	133	016
22 Jun 2025	130	012

Solaraktive Regionen und Flares

Solar flaring activity was at high levels over the past 24 hours. A total of 7 numbered sunspot groups were identified on the visible solar disk. The strongest activity was a X1.9 flare (SIDC 4707) produced by SIDC Sunspot Group 523 (NOAA Active Region 4114) with peak time 09:17 UTC on June 19. This region was responsible for most of the flaring activity, including an M4.6 flare (SIDC Flare 4711) peak time 00:04 UTC on June 20. The region has meanwhile decreased its underlying magnetic field complexity and is currently classified as magnetic type beta-gamma. Other notable regions are SIDC Sunspot Group 526 (NOAA Active Region 4117), classified as beta-gamma and SIDC Sunspot Group 527 (NOAA Active Region 4118), classified as magnetic type beta. The solar flaring activity is expected to be at moderate levels over the next 24 hours with expected C-class flares and 55% chances of M-class flaring.

Koronaler Massenauswurf

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

Koronale Löcher

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. High speed stream emanating from it is expected to continue influencing the Earth over the next days.

Sonnenwind

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) remained under the continuous influence of a high speed stream from a large positive-polarity coronal hole, which continues to partly reside on the central meridian. The interplanetary magnetic field (B) was mildly enhanced with a maximum value of 9.7 nT and a minimum Bz of -7.7 nT. The solar wind speed was slowly varying, currently around 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.

Geomagnetismus

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 remain so in the next 24 hours.

Protonenflusswerte

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.

Elektronenflüsse im geostationären Orbit

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

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 112, basierend auf 25 Stationen.

Solarindizes für den 19 Jun 2025

Wolf-Zahl Catania	104
10cm Solarflux	136
AK Chambon La Forêt	019
AK Wingst	012
Geschätzer Ap-Wert	013
Geschätzte internationale Sonnenfleckenzahl	132 - Basierend auf 25 Stationen

Zusammenfassung auffälliger Ereignisse

Zur Verfügung gestellt vom Solar Influences Data Analysis Center© - SIDC - Verarbeitet von SpaceWeatherLive

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