Electron 2 MeV Integral Flux Alert issued on November 1

An electron 2 MeV integral flux alert was issued at 13:02 UTC on November 1, 2026. According to the alert, the threshold of 1,000 pfu was reached at the GOES-19 station, prompting NOAA’s Space Weather Prediction Center to issue this notification.

This alert indicates that the integral flux of electrons at energies greater than 2 MeV has exceeded the specified threshold. Such conditions may pose an increased risk to satellites and spacecraft operating in the affected energy range, potentially causing surface charging or anomalies in satellite systems. The alert does not correspond to the official Solar Radiation Storms (S-scale) as defined by NOAA but is relevant for operators monitoring space-based assets.

Recent space weather discussions report that the electron flux had been at normal to moderate levels but was projected to reach high levels, consistent with the timing of this alert. No significant solar flares or Earth-directed coronal mass ejections (CMEs) were observed, and proton flux levels remained at background values during this period.