Alert – Electron 2 MeV Integral Flux exceeded 1,000 pfu issued on November 9

An alert for Electron 2 MeV Integral Flux exceeding 1,000 pfu was issued by the NOAA Space Weather Prediction Center on November 9, 2026, at 10:01 UTC. The alert remains in effect following elevated electron flux observed since November 8, 2026, at 22:45 UTC. The maximum electron flux recorded was 1,228 pfu at 23:35 UTC on November 8.

Elevated levels of greater than 2 MeV electron flux can pose potential hazards to satellite operations, including surface charging effects and increased risk of anomalies in satellite electronics. Such high flux conditions are closely monitored due to their possible impact on spacecraft and related infrastructure.

According to the NOAA SWPC Forecast Discussion issued on November 9, 2026, the greater than 2 MeV electron flux reached high levels over the past 24 hours and is expected to remain high through November 11, 2026. No radiation storm levels have been reached for proton flux. The elevated electron flux is associated with ongoing influences from a negative polarity coronal hole high speed solar wind stream.