Electron flux alert issued on March 27, 2026

An alert for elevated electron flux values at geosynchronous orbit was issued on March 27, 2026, at 05:00 UTC. According to the alert, the Electron 2 MeV Integral Flux exceeded 1,000 pfu, with maximum observed values reported at 11,382 pfu on March 26. This continued alert first began on March 22, 2026, at 14:30 UTC, and remains in effect due to persistently high electron flux readings.

The primary potential impact of sustained elevated electron flux is significant charging of satellite systems. This condition leads to an increased risk to satellite operations, as indicated by NOAA’s official space weather alert. Enhanced charging events can affect satellite reliability and mission continuity.

Forecast data indicate that the greater than 2 MeV electron flux is expected to remain at high levels through March 27 before gradually returning to more moderate levels on March 28–29, 2026. Proton flux values remained at background levels throughout the period. No Earth-directed coronal mass ejections were reported in the most recent solar activity summary.