Electron 2 MeV Integral Flux Alert issued on November 10

An Electron 2 MeV Integral Flux Alert was issued on November 10, 2026, following the continued exceedance of electron flux levels above 1,000 pfu. The alert remains active after first being triggered on November 8, 2026, at 22:45 UTC. According to NOAA SWPC, the maximum reported 2 MeV electron flux over the past 24 hours was 4,674 pfu, observed at 16:30 UTC on November 9, 2026.

Electron flux alerts of this nature indicate that high-energy electron levels in the near-Earth environment have reached thresholds that may pose risks to satellite systems. Such conditions can increase the likelihood of surface charging on spacecraft, especially those in geosynchronous orbit, and may require operators to implement mitigation strategies.

The elevated electron flux is associated with ongoing influences from a negative polarity coronal hole high-speed solar wind stream. SWPC’s latest forecast discussion reports that the high-speed stream has kept the near-Earth solar wind environment enhanced and that high electron flux levels are likely to persist through November 12, 2026.