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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2026 Apr 13 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
13 Apr 2026	099	007
14 Apr 2026	099	013
15 Apr 2026	097	007

Solaraktive Regionen und Flares

A total of 4 numbered sunspot groups were identified on the disk over the past 24 hours, with simple alpha or beta magnetic field configuration. There was only one C-class flare in the last 24 hours. This was a C1.2 flare from SIDC Sunspot Group 842 (NOAA AR 4414), currently located at N15E12 with a Beta magnetic configuration. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely.

Koronaler Massenauswurf

No Earth-directed CMEs were observed int he last 24 hours.

Koronale Löcher

There are two mid-latitude positive polarity coronal holes (SIDC Coronal Holes 154 and 158) in the western hemisphere, and one (159) crossing the central meridian, also with positive polarity.

Sonnenwind

The solar wind speed is low, around 420 km/s with interplanetary magnetic field magnitude of 6 nT, with positive polarity (away from the Sun). In the next 24 hours, there is a possible arrival of a mild fast solar wind stream from the small positive polarity coronal holes (SIDC Coronal Holes 154 and 158).

Geomagnetismus

Geomagnetic conditions have been quiet to unsettled (Kp up to 2 and K_BEL up to 3). Similar conditions can be expected for the next 24 hours, with possible active to minor storm periods if the fast solar wind from SIDC Coronal Holes 154 and 158 arrives to the Earth.

Protonenflusswerte

The greater than 10 MeV proton flux, as measured by GOES-18, was below the 10pfu threshold level over the past 24 hours and is expected to remain so for the next 24 hours.

Elektronenflüsse im geostationären Orbit

The greater than 2 MeV electron flux, as measured by GOES-19, remained below the 1000 pfu alert threshold over the past 24 hours. The greater than 2 MeV electron flux, as measured by GOES-18, briefly exceeded the 1000 pfu alert threshold between 17:00 UTC and 23:00 UTC on April 12 and remained below the threshold for the rest of the period. The flux is expected to remain mostly below the alert threshold over the next 24 hours. The 24-hour electron fluence was at normal to moderate levels over the past 24 hours and is expected to remain at these levels over the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 062, basierend auf 08 Stationen.

Solarindizes für den 12 Apr 2026

Wolf-Zahl Catania	///
10cm Solarflux	099
AK Chambon La Forêt	012
AK Wingst	009
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	043 - Basierend auf 20 Stationen

Zusammenfassung auffälliger Ereignisse

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

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