Electron 2 MeV flux alert issued on September 14, 2026

An Electron 2 MeV Integral Flux Alert was issued on September 14, 2026, following observations of the electron flux exceeding the threshold of 1,000 particle flux units (pfu). The alert, ongoing since September 10, 2026 at 13:04 UTC, was confirmed after the maximum 2 MeV electron flux reached 1,827 pfu at 18:00 UTC on September 13. This indicates elevated levels of high-energy electrons in Earth’s outer radiation belt conditions.

High levels of electron flux can impact satellites operating in geosynchronous orbit, increasing the risk of deep dielectric charging and potentially affecting spacecraft operations and electronics. According to the alert, the maximum observed flux was 3,370 pfu at 13:40 UTC on September 13, with predictions suggesting these high levels are likely to persist through September 14 before declining to low or moderate levels on September 15 and 16. Proton levels remain at background, and no Solar Radiation Storm is indicated at this time.

The current energetic electron environment has not been strongly linked to major solar flare activity. While a long-duration C1.4 class flare occurred at 19:45 UTC on September 13, associated with an eruption to the west of Region 4528, no direct connection to the ongoing enhanced electron event has been established in the latest forecast discussion.