Electron flux alert issued on April 19, 2026

An Electron 2 MeV Integral Flux Alert was issued on April 19, 2026, after electron flux levels exceeded 1,000 particles per square centimeter per second per steradian (pfu) at 19:20 UTC, as measured by station GOES19. The alert was officially issued at 19:47 UTC.

Potential impacts of this event include significant charging in satellite systems, which may lead to an increased risk for satellite operations. Such elevated electron fluxes can pose a hazard to spacecraft electronics and may result in anomalies or operational disruptions.

According to the latest NOAA SWPC forecast discussion, electron flux at geosynchronous orbit was already at moderate levels, with predictions indicating continued moderate to high levels from April 19 to 21, 2026. Solar activity remained low during the period, with no significant solar flares or Earth-directed CMEs observed.