Electron 2 MeV Integral Flux Alert issued on June 14, 2026

An Electron 2 MeV Integral Flux Alert was issued on June 14, 2026, by the NOAA Space Weather Prediction Center. This alert was triggered after the electron flux at energies greater than 2 MeV exceeded the threshold of 1,000 pfu. The event began on June 13, 2026 at 13:32 UTC and continued into June 14, with a maximum observed value of 1,520 pfu reported for the previous day.

Elevated levels of high-energy electron flux in the Earth’s outer radiation belt are most commonly associated with increased solar wind speed streams from coronal holes. Such enhancements may pose risks to satellite operations and spacecraft systems in geosynchronous orbit due to potential surface charging and deep dielectric charging anomalies.

According to the latest forecast discussion issued at 12:30 UTC on June 14, 2026, the high electron flux levels are attributed to the influence of a negative polarity coronal hole high speed stream (CH HSS) combined with lingering minor coronal mass ejection effects observed earlier in the period. The electron flux is expected to remain at high levels through June 16, while overall solar activity remains low and proton flux remains at background levels.