Electron 2 MeV Integral Flux Alert issued on August 25, 2026

An Electron 2 MeV Integral Flux Alert was issued on August 25, 2026, by NOAA’s Space Weather Prediction Center. The alert was triggered after the integral flux of electrons at 2 MeV exceeded 1,000 pfu, with this elevated condition first being recorded on August 21, 2026, at 11:05 UTC. The maximum recorded flux yesterday reached 1,030 pfu at 07:10 UTC on August 25, and high levels of 2 MeV electron flux are expected to persist.

Sustained high levels of energetic electron flux can pose risks to satellites operating in geosynchronous orbit, including increased deep dielectric charging which may potentially disrupt satellite operations or degrade components. Operations in affected orbital ranges should remain alert for possible anomalies. The continued alert signals that flux values remain above threshold and close monitoring is ongoing.

According to NOAA’s latest forecast, the current solar energetic particle environment is related to a period of moderate solar activity, including an M1.7 solar flare detected on August 24, 2026, at 19:36 UTC from Active Region 4513. This event likely contributed to the elevated energetic particle environment being observed.