Space Weather Message Code: ALTEF3

Serial Number: 3681

Issue Time: 2026 Apr 21 1341 UTC



CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu

Continuation of Serial Number: 3680

Begin Time: 2026 Apr 19 1920 UTC

Yesterday Maximum 2MeV Flux: 1344 pfu






Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

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