Electron 2 MeV Integral Flux Alert issued on November 1

An Electron 2 MeV Integral Flux Alert was issued on November 1, 2025, at 05:00 UTC, following continued flux levels exceeding 1,000 pfu since October 31, 2025. The maximum 2 MeV electron flux measured yesterday was 4,767 pfu, indicating prolonged elevated activity.

Potential impacts from this alert include significant charging of satellite systems. This condition increases the risk to satellite systems due to enhanced energetic electron levels, which can cause deep dielectric charging and related anomalies.

According to the NOAA Space Weather Prediction Center’s latest forecast discussion, the high levels of 2 MeV electron flux were associated with ongoing high-speed solar wind streams. The electron flux reached peak levels at 31/1850 UTC. The greater than 2 MeV electron flux is expected to remain elevated with a chance for high levels continuing through November 2 due to sustained high-speed stream influence and a possible subtle disturbance arriving near Earth on November 3.