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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2025 Apr 11 1252 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
11 Apr 2025	155	018
12 Apr 2025	157	012
13 Apr 2025	157	015

Solaraktive Regionen und Flares

Solar flaring activity was at low levels over the past 24 hours with background C-class flaring. A total of 8 numbered sunspot groups were identified on the disk over the past 24 hours. The most complex regions are SIDC Sunspot Group 461 (NOAA Active Region 4048), which is now approaching the west limb, SIDC Sunspot Group 469 (NOAA Active Region 4055) and SIDC Sunspot Group 470 (NOAA Active Region 4058), which have both exhibited further growth and flux emergence. These three regions are classified as magnetic type beta-gamma. The largest flare was a C4.4 flare (SIDC Flare 4073) peaking on April 11 at 07:14 UTC, produced by SIDC Sunspot Group 469, which contributed to most of the flaring activity over the past 24 hours. The solar flaring activity is expected to remain at low levels to moderate levels with likely M-class flaring over the next 24 hours.

Koronaler Massenauswurf

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

Koronale Löcher

The negative polarity coronal hole which first crossed the central meridian on April 07 continues to partly reside there. High speed stream emanating from it might be expected at Earth starting on April 10.

Sonnenwind

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) reflected mildly enhanced conditions reflecting mild connection a high speed stream emanating from a negative polarity coronal hole. The magnitude of the interplanetary magnetic field (B) reached a maximum value of 8 nT with a minimum Bz of -7.5 nT. The solar wind speed varied at close to 500 km/s. The B field phi angle was predominantly in the negative sector (directed towards the Sun). The solar wind conditions are expected to remain enhanced over the next few days under the influence of a high speed stream.

Geomagnetismus

The geomagnetic conditions over the past 24 hours were quiet to active. Predominantly quiet to active geomagnetic conditions with remaining chances for isolated minor storms are expected for the next days.

Protonenflusswerte

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

Elektronenflüsse im geostationären Orbit

The greater than 10 MeV GOES 18 electron fluxes has exceeded the 1000 pfu threshold over the last 24 hours and is expected to exceed the 1000 pfu threshold in the next 24 hours. The 24-hour electron fluence was at moderate levels and is expected to remain so in the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 125, basierend auf 29 Stationen.

Solarindizes für den 10 Apr 2025

Wolf-Zahl Catania	155
10cm Solarflux	153
AK Chambon La Forêt	028
AK Wingst	018
Geschätzer Ap-Wert	018
Geschätzte internationale Sonnenfleckenzahl	132 - Basierend auf 26 Stationen

Zusammenfassung auffälliger Ereignisse

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

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