Electron 2 MeV Integral Flux Alert issued on September 13

An Electron 2 MeV Integral Flux Alert was issued on September 13, 2026, at 08:27 UTC, following continued elevated electron flux levels. The alert indicates that the integral flux of electrons with energies greater than 2 MeV has exceeded the threshold of 1,000 pfu, with the event originally beginning on September 10, 2026, at 13:04 UTC. The highest recorded flux yesterday reached 1,828 pfu at 16:15 UTC on September 12, 2026.

Sustained high levels of electron flux at geosynchronous orbit can result in increased charging of satellite surfaces, potentially leading to surface anomalies or operational issues for spacecraft. These conditions may necessitate heightened monitoring and mitigation measures by satellite operators.

The elevated electron flux was confirmed in the latest SWPC discussion, which reported a maximum of 1,830 pfu observed at 17:10 UTC on September 12, 2026. Solar activity contributing to these conditions remained at low levels, with no significant Earth-directed CMEs observed over the period.