Electron 2 MeV Integral Flux Alert issued on June 26, 2026

An Electron 2 MeV Integral Flux Alert was issued on June 26, 2026, after electron flux levels exceeded the threshold of 1,000 pfu at 13:45 UTC, as observed by the GOES-19 satellite. The alert was formally released at 14:06 UTC. For comparison, the maximum flux recorded the previous day was 480 pfu.

Elevated electron flux levels above 1,000 pfu can impact satellite operations, particularly for spacecraft in geosynchronous orbit. High electron fluxes can increase the risk of internal charging and potential anomalies on affected satellites. No geomagnetic storms or solar radiation storms were in progress, and only electron flux levels met alert criteria at this time.

This alert occurred during a period of generally low solar activity, characterized by frequent C-level flares, with the largest being a C6.6 from solar region 4478 on June 25 at 15:03 UTC. No Earth-directed coronal mass ejections were reported, and energetic proton flux levels remained at background values. The official SWPC forecast expects electron flux to remain at normal to moderate levels over the next several days.