Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2026 Apr 27 1246 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Minor storm expected (A>=30 or K=5)

Sonnenprotonen

Quiet

10cm FlussAp
27 Apr 2026157014
28 Apr 2026157018
29 Apr 2026155018

Solaraktive Regionen und Flares

Solar flaring activity was high over the past 24 hours, with 5 M-class flares identified. The largest flare was a M6.0 flare (SIDC Flare 7519) peaking on April 26 at 22:57 UTC, which was produced by SIDC Sunspot Group 847 (NOAA Active Region (AR) 4420). During the flare, the source region (SIDC Sunspot Group 847) of the flare had beta-gamma-delta configuration of its photospheric magnetic field. A total of 7 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Groups 805 and 847 (NOAA AR 4425 and 4420) are the most complex regions, with a beta-gamma-delta magnetic configuration, which has produced all the M-class flaring activity over the past 24 hours. Solar flaring activity is expected to be at moderate to high over the next 24 hours, with M-class flares very likely and a chance for X-class flares.

Koronaler Massenauswurf

No Earth-directed coronal mass ejections were detected in the available coronagraph observations during the last 24 hour.

Koronale Löcher

SIDC Coronal Hole (CH) 149, spanning 8 S - 25 S (negative polarity), is crossing the central meridian, and the high-speed streams from this CH may enhance the solar wind environment near Earth on Apr 29-31.

Sonnenwind

Solar wind parameters were slightly enhanced during the past 24 hours. The solar wind speed ranged from 400 km/s to 500 km/s. The interplanetary magnetic field ranged from 0 nT to 9 nT, and the North-South component (Bz) ranged from -4 nT to 7 nT. Solar wind conditions may get more enhanced if high-speed streams associated with SIDC Coronal Holes 156 and 157 arrive.

Geomagnetismus

Geomagnetic conditions were globally at quiet to unsettled conditions (NOAA Kp 1 and 3) globally, and locally at quiet to active conditions (K_BEL 1 to 4) during the past 24 hours. Active to minor storm conditions are expected over the next 24 hours.

Protonenflusswerte

The greater than 10 MeV GOES proton flux was below the threshold level over the past 24 hours and it 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-18 satellite, increased and exceeded the 1000 pfu threshold level from 20:10 UTC to 23:50 UTC on Apr 26, over the past 24 hours. It may exceed the threshold level again in the next 24 hours. The greater than 2 MeV electron flux, as measured by GOES-19 satellite, was below the 1000 pfu threshold level in the last 24 hours, and is expected to remain so. The 24h electron fluence was at normal levels and is expected to remain so in the coming 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 132, basierend auf 23 Stationen.

Solarindizes für den 26 Apr 2026

Wolf-Zahl Catania///
10cm Solarflux156
AK Chambon La Forêt019
AK Wingst012
Geschätzer Ap-Wert013
Geschätzte internationale Sonnenfleckenzahl129 - Basierend auf 29 Stationen

Zusammenfassung auffälliger Ereignisse

TagStartMaxEndeLocStärkeOP10cmCatania/NOAARadioburst-Typen
26135414031408N15W12M1.4S--/4420
26191819241927----M1.7--/4420
26195420042007N05E55M2.21N--/4425
26225122572302----M6.0--/4420III/2II/2
27063906450650N06E44M1.0SF90/4425

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

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Weltraumwetter-Fakten

Letzte Klasse X-Eruption24/04/2026X2.5
Letzte Klasse M-Eruption27/04/2026M1.0
Letzter geomagnetischer Sturm20/04/2026Kp5 (G1)
Tage ohne Flecken
Letzte 365 Tage3 Tage
20263 Tage (3%)
Letzter fleckenlose Tag24/02/2026
Monatliche mittlere Sonnenfleckenzahl
März 202685.9 +7.7
April 202685 -0.9
Letzte 30 Tage90.9 +8.3

An diesem Tag in der Vergangenheit*

Sonneneruptionen
11998X1.54
22006X1.13
32024M3.1
42003M2.46
52024M2.1
DstG
11960-100G3
21989-98G2
31981-95G2
41984-91G1
51979-84G1
*seit 1994

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