Electron 2 MeV flux alert issued on July 27, 2026

An alert for Electron 2 MeV Integral Flux exceeding 1,000 pfu was issued on July 27, 2026. This continued alert follows sustained elevated electron flux, with the exceedance originally beginning at 15:34 UTC on July 26, 2026. The maximum observed 2 MeV electron flux reached 1,063 pfu at 14:45 UTC on July 27, 2026.

Elevated electron flux levels above 1,000 pfu can impact satellite operations, especially on spacecraft in geosynchronous orbit. Effects may include increased deep dielectric charging, which can contribute to anomalies or data errors. Communications and navigation systems relying on satellite links may experience degraded performance during these periods of enhanced particle flux.

According to the latest forecast from the NOAA Space Weather Prediction Center, these high electron flux conditions were observed as the influence of a coronal hole high-speed stream diminished. The flux levels are expected to remain high on July 27, with moderate levels likely on July 28 and July 29 as the disturbed solar wind environment gradually returns to background conditions. No significant solar proton events have been detected, and overall geomagnetic activity remains mostly quiet.