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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2026 May 22 1250 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
22 May 2026	121	006
23 May 2026	123	005
24 May 2026	125	005

Solaraktive Regionen und Flares

Solar flaring activity was moderate over the past 24 hours, with an M4.3 (SIDC flare 7753, peaked on 22 Mar at 10:20 UTC) identified. It was produced by SIDC Sunspot Group (SG) 825 (NOAA Active Region [AR] 4436, Beta magnetic configuration) despite being located at the back of the west limb. The same SG also emitted most of the C-class flares of the past 24 hours (seven out of 11). More C-class flaring activity is expected in the next 24 hours, however since SIDC SG 825 will be even further behind the limb, the activity is expected to be less frequent and not reach M-class levels.

Koronaler Massenauswurf

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Sonnenwind

The Solar Wind (SW) conditions of the past 24 hours feature a slow SW regime. The SW speed gradually dropped from 480 to 380 km/s, the interplanetary magnetic field (B) was up to 8 nT, and its North-South component (Bz) varied from -4 to 5 nT. The SW conditions are expected to remain at the current levels in the next 24 hours.

Geomagnetismus

The geomagnetic conditions of the past 24 hours reach at quiet levels both globally and locally (NOAA Kp 1+ to 2 and K BEL 1 to 2). In the next 24 hours it is likely that they will continue at the same levels.

Protonenflusswerte

The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at nominal levels over the past 24 hours and is likely to remain so in the next 24 hours.

Elektronenflüsse im geostationären Orbit

The greater than 2 MeV electron flux as, measured by GOES 19, was around the 1000 pfu alert threshold for past 24 hours. It reached a peak value of 2800 pfu on 21 May at 15:50 UTC. It is expected to remain at the same levels in the next 24 hours. The electron fluence was at moderate levels in the past 24 hours and it is likely to remain at the same levels in the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 108, basierend auf 16 Stationen.

Solarindizes für den 21 May 2026

Wolf-Zahl Catania	117
10cm Solarflux	118
AK Chambon La Forêt	008
AK Wingst	010
Geschätzer Ap-Wert	008
Geschätzte internationale Sonnenfleckenzahl	088 - Basierend auf 18 Stationen

Zusammenfassung auffälliger Ereignisse

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

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