Electron 2 MeV integral flux alert issued on September 10

An Electron 2 MeV Integral Flux Alert was issued on September 10, 2026, after monitored flux levels exceeded the alert threshold of 1,000 pfu. The alert was triggered at 13:04 UTC, with the alert issued at 13:06 UTC. This event was observed by the GOES-19 satellite. Previous day’s maximum flux reached 1,037 pfu.

Elevated electron flux can lead to increased satellite charging on spacecraft in geosynchronous orbit, which can potentially impact satellite operations and data integrity. The alert confirms that electron flux at energies greater than 2 MeV reached levels that warrant operators to take cautionary measures. According to NOAA’s operational thresholds, events of this nature are monitored due to the risk to space-based technologies.

Forecasts from the NOAA Space Weather Prediction Center indicate that greater than 2 MeV electron flux is expected to remain at high levels through September 12, 2026. No significant increase in solar activity, solar flares, or proton events was reported in association with this electron flux enhancement, and solar wind and geomagnetic field conditions remained generally quiet.