Electron 2 MeV flux alert issued on September 12, 2026

An alert for elevated electron 2 MeV integral flux was issued by NOAA SWPC on September 12, 2026, at 06:45 UTC. This continues a prior alert, with flux levels having exceeded the 1,000 pfu threshold since September 10, 2026, at 13:04 UTC. The highest electron flux recorded yesterday reached 7,008 pfu at 13:55 UTC on September 11, 2026.

Elevated electron flux levels above 1,000 pfu can potentially affect spacecraft operations and increase deep dielectric charging on satellites in geosynchronous orbit. No direct impacts to ground-based systems or communications are anticipated from this electron event, but satellite operators are advised to monitor for anomalies related to energetic electron environment.

According to the latest forecast discussion from NOAA SWPC, the increase in electron flux is not associated with any significant solar flare or coronal mass ejection, as solar activity remains low. The electron levels are expected to continue at high levels on September 12 and decrease to low to moderate on September 13 and 14, 2026.