Electron 2 MeV Integral Flux Alert issued on November 2

An Electron 2 MeV Integral Flux Alert was issued on November 2, 2025, by the NOAA Space Weather Prediction Center after the flux exceeded 1,000 pfu. The alert continues an earlier alert issued on October 31, 2025, beginning at 12:50 UTC. The maximum recorded 2 MeV electron flux yesterday was 10,574 pfu.

Potential impacts from this event include significant charging of satellite systems, which results in an increased risk to satellite operations. Periods of elevated electron flux can raise the threat of internal charging, leading to possible anomalies or disruptions in satellite function.

The latest SWPC forecast discussions indicate that the elevated electron levels are persisting as the influence from a high-speed solar wind stream wanes. The greater than 2 MeV electron flux is expected to remain at moderate to high levels unless other transient space weather events push them back toward normal levels.