Electron 2 MeV Integral Flux alert issued on December 24

An Electron 2 MeV Integral Flux Alert was issued on December 24, 2025, at 05:06 UTC. The alert is in continuation since December 21, 2025, 14:25 UTC, after electron flux levels at geosynchronous orbit exceeded 1,000 pfu. The maximum 2 MeV electron flux observed yesterday reached 5,557 pfu.

According to the NOAA Space Weather Prediction Center, these elevated electron flux levels may result in significant charging of satellite systems, increasing the risk to satellite operations. Such conditions are known to potentially disrupt satellite electronics and degrade system performance.

The forecast discussion from December 24, 2025, confirms that the greater than 2 MeV electron flux remained at high levels, with a peak of 5,560 pfu observed on December 23. These high levels are forecast to persist through December 26, 2025. The current elevated electron flux is associated with ongoing enhanced solar wind conditions driven by a positive polarity coronal hole high-speed stream. No Earth-directed coronal mass ejections have been detected in the available data.