Electron flux alert issued on May 24, 2026

An alert for electron 2 MeV integral flux exceeding 1,000 pfu was issued on May 24, 2026, at 05:00 UTC by NOAA SWPC. The continued alert notes that the elevated flux levels began on May 16, 2026, and remain in effect following a maximum recorded value of 3,762 pfu on the previous day.

Elevated electron flux at geosynchronous orbit can pose risks to satellites and other spacecraft, including increased surface charging and potential electrostatic discharge events. These conditions are monitored closely due to their relevance for spacecraft operators and users of space-based technological systems.

Current space weather data show that the greater than 2 MeV electron flux has reached moderate to high levels, peaking at 4,016 pfu on May 23, 2026. The flux is expected to remain at moderate to high levels through May 25 before decreasing to low to moderate values by May 26.