Electron 2 MeV Integral Flux Alert issued on October 13

An Electron 2 MeV Integral Flux Alert was issued on October 13, 2025, after observed flux levels exceeded 1,000 pfu. The current alert is a continuation, first beginning on October 1, 2025 at 13:25 UTC, with the most recent maximum flux measured at 1,707 pfu yesterday.

During periods like this, satellite systems may experience significant charging, resulting in an increased risk to satellite operations. High-energy electron environments at geosynchronous orbit pose an elevated threat for satellite anomalies, internal charging, and possible malfunctions. Operators are advised to remain alert for potential disruptions or impacts.

According to the NOAA SWPC forecast discussion issued on October 13, 2025, the greater than 2 MeV electron flux is expected to remain at high levels through October 15, 2025. This elevated flux is not linked to a major solar flare or solar radiation storm event, and the greater than 10 MeV proton flux remains at background levels.