Electron 2 MeV Integral Flux Alert issued on October 30

An Electron 2 MeV Integral Flux Alert was issued by NOAA’s Space Weather Prediction Center on October 30, 2026. The alert was triggered after the 2 MeV electron flux exceeded the 1,000 pfu threshold, with high levels continuing since October 23, 2026, at 11:40 UTC. The maximum reported flux yesterday was 1,228 pfu, peaking at 16:30 UTC on October 29, 2026.

Elevated 2 MeV electron flux can increase the risk of satellite anomalies, surface charging, and deep dielectric charging in spacecraft operating within geosynchronous orbit. Such conditions require continued monitoring by satellite operators for operational impacts.

According to the latest forecast discussion, energetic particle fluxes reached high levels over the last 24 hours. The greater than 2 MeV electron flux is expected to decrease to normal to moderate levels starting October 30 and remain stable through November 1. No Earth-directed coronal mass ejections (CMEs) or significant solar activity were observed during this period.