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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2026 May 21 1232 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
21 May 2026	114	006
22 May 2026	110	005
23 May 2026	108	004

Solaraktive Regionen und Flares

Solar flaring activity was very low over the past 24 hours. The X-ray flux was below C level. SIDC Sunspot Group 825 (NOAA Active Region 4436, Beta magnetic configuration) is currently rotating behind the west limb, however a large part of its flaring activity will continue to be detectable in the next 24 hours. Isolated C-class activity is likely during the next 24 hours.

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 ranged from 410 to 510 km/s, the interplanetary magnetic field (B) was up to 5 nT, and its North-South component (Bz) varied from -5 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 reached unsettled levels both globally and locally (NOAA Kp 3 and K BEL 3) on 21 May from 00:00 to 03:00 UTC. The remaining time both global and local conditions were at quiet levels (NOAA Kp 1- to 2+ and K BEL 1 to 2). In the next 24 hours it is likely that they will continue at quiet 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 1700 pfu on 20 May at 16:20 UTC. It is expected to marginally drop in the next 24 hours and possibly stay below the alert threshold. The electron fluence was at moderate levels in the past 24 hours and it is likely to drop to normal levels at some point in the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 088, basierend auf 13 Stationen.

Solarindizes für den 20 May 2026

Wolf-Zahl Catania	086
10cm Solarflux	114
AK Chambon La Forêt	013
AK Wingst	010
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	072 - Basierend auf 24 Stationen

Zusammenfassung auffälliger Ereignisse

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

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