High electron flux alert issued on April 23, 2026

A continued alert for elevated electron flux at geosynchronous orbit was issued on April 23, 2026. The alert, noting the electron 2 MeV integral flux exceeded 1,000 pfu, has been in effect since April 19, 2026 at 19:20 UTC. Yesterday, the maximum 2 MeV electron flux reached 4,922 pfu.

Potential impacts from this elevated electron flux include significant charging of satellite systems, resulting in an increased risk to satellite operations. Such conditions can potentially lead to anomalies or damage within satellite electronics due to high-energy particle buildup.

According to the latest forecast, the greater than 2 MeV electron flux is expected to remain at moderate to high levels through April 25, 2026. No Earth-directed coronal mass ejections were observed during this period, and overall solar activity remained at low levels.