Electron 2 MeV Integral Flux Alert issued on June 18, 2026

An Electron 2 MeV Integral Flux Alert was issued on June 18, 2026, at 15:07 UTC after flux levels recorded by GOES-19 satellite exceeded 1,000 pfu. This alert indicates an elevated level of energetic electrons in near-Earth space as monitored by NOAA’s Space Weather Prediction Center.

Elevated electron fluxes can pose increased risks to satellites and spacecraft, especially those in geostationary and medium Earth orbits. High electron fluxes may contribute to internal charging on spacecraft, which can impact sensitive electronic components and potentially lead to operational anomalies.

According to the latest forecast discussion from NOAA SWPC, the electron flux at energies greater than 2 MeV reached moderate levels and is expected to continue at similar levels through June 20, 2026. No significant solar flares or Earth-directed coronal mass ejections were observed around the alert period. The geomagnetic field has remained mostly quiet, with only modest solar wind disturbances anticipated in the coming days due to weak coronal hole high speed stream effects.