Alert – Electron 2 MeV Integral Flux exceeded 1,000 pfu issued on April 7

An alert for high-energy electrons was issued after the Electron 2 MeV Integral Flux exceeded 1,000 pfu on April 7, 2026. This continued alert, referencing serial number 3667, indicates elevated electron flux levels have persisted since April 3, 2026, at 09:20 UTC. According to the report, the maximum 2 MeV flux observed yesterday reached 6,075 pfu.

Potential impacts from this ongoing event include significant charging of satellite systems, which may result in increased risk for satellite operations. High electron flux levels can cause surface and deep dielectric charging on spacecraft, which can potentially lead to operational anomalies.

The latest forecast discussion from NOAA SWPC indicated that the greater than 2 MeV electron flux reached high levels with a peak of 6,075 pfu at 06/1700 UTC. The flux levels are expected to remain high between April 7–9, 2026.