Electron 2 MeV integral flux alert issued on March 25

An alert for Electron 2 MeV Integral Flux exceeding 1,000 pfu was issued by the NOAA Space Weather Prediction Center on March 25, 2026, at 04:59 UTC. This continued alert notes that elevated high-energy electron levels have persisted at geosynchronous orbit since March 22, 2026, beginning at 14:30 UTC. The peak 2 MeV electron flux observed on March 24 reached 11,907 pfu.

Potential impacts from this ongoing event include significant charging of satellite systems, increasing the risk to onboard electronics and satellite operations. Operators of spacecraft are advised to remain vigilant, as periods of high electron flux are known to cause electrical anomalies and degradation in satellite components.

According to NOAA’s latest forecast discussion, the heightened 2 MeV electron flux is expected to continue through March 27, 2026. The condition was not triggered by any Earth-directed coronal mass ejection or substantial flare activity, with only low solar activity and minor flaring observed during the period reported.