Electron 2 MeV Integral Flux Alert issued on October 11

An Electron 2 MeV Integral Flux Alert was issued on October 11, 2025, after flux values exceeded the threshold of 1,000 pfu. The alert, issued at 04:59 UTC, indicates continued elevated electron flux levels throughout the start of October, including a reported maximum of 2,513 pfu on the previous day.

Potential impacts from this event include significant charging of satellite systems, which results in an increased risk to satellite operations. Elevated electron fluxes can affect satellite electronics and subsystems, increasing the likelihood of anomalies or outages.

According to the latest forecast discussion from the NOAA Space Weather Prediction Center, greater than 2 MeV electron flux is expected to continue at high levels over October 11 to 13, 2025. The report notes that such conditions have persisted, and no large solar flares or Earth-directed coronal mass ejections have been observed. The continuation of high electron flux is not attributed to recent solar flares but is expected to persist as forecasted.