Electron 2 MeV Integral Flux Alert issued on June 15, 2026

An alert for Electron 2 MeV Integral Flux exceeding 1,000 pfu was issued on June 15, 2026. The alert continues from June 13, 2026 at 13:32 UTC, with the maximum 2 MeV Electron Flux reaching 1,581 pfu as observed in data from the previous day. This meets the threshold for high-level electron events, as tracked by NOAA SWPC.

Elevated electron flux levels above 1,000 pfu can increase the potential for satellite anomalies and high-frequency noise in satellite communications and navigation systems. These conditions are monitored closely due to their potential impact on systems in geosynchronous orbit. The flux levels reported remain above the alert threshold, signifying heightened monitoring requirements for affected operations.

According to the most recent NOAA SWPC forecast discussion issued on June 15, 2026, solar activity has remained at low levels with only minor C-class activity recorded. The greater than 2 MeV electron flux is likely to remain at high levels through June 17, 2026, while the greater than 10 MeV proton flux is expected to stay at background levels. No Earth-directed coronal mass ejections or significant solar flares were noted as triggers in this update.