Electron 2 MeV Integral Flux Alert issued on April 4, 2026

A continued alert for Electron 2 MeV Integral Flux exceeding 1,000 pfu was issued on April 4, 2026, at 11:58 UTC. This alert follows ongoing elevated electron levels observed since April 3, 2026, at 09:20 UTC, and reports a maximum recorded 2 MeV electron flux of 4,465 pfu on the previous day.

Potential impacts from this event include significant charging of satellite systems, which may result in increased risk to satellite operations. Operators are advised to take appropriate precautions to mitigate the effects of high electron flux levels on satellite hardware according to NOAA guidance for elevated energetic particle environments.

According to the latest NOAA SWPC forecast discussion, the greater than 2 MeV electron flux reached high levels with a peak flux of 4,465 pfu over the past 24 hours. The greater than 2 MeV electron flux is expected to remain at high levels from April 4 through April 6, 2026. While the greater than 10 MeV proton flux remained below S1 – Minor Solar Radiation Storm thresholds, its levels were elevated during the period.