Electron 2 MeV integral flux alert issued on June 13

An alert for Electron 2 MeV Integral Flux exceeding 1,000 pfu was issued by NOAA SWPC on June 13, 2026. The threshold was reached at 13:32 UTC and the alert was formally issued at 13:33 UTC. Measurements were observed by the GOES-19 satellite.

Exceedance of the 1,000 pfu threshold for 2 MeV electron flux signals heightened levels of energetic electrons in Earth’s magnetosphere. Such conditions are monitored due to their potential impact on satellite operations, including potential surface charging and increased risk of anomalies in satellite electronics. The alert was triggered as part of ongoing space weather surveillance and does not indicate a Solar Radiation Storm.

According to the latest forecast discussion issued at 12:30 UTC on June 13, solar activity remained low with no significant solar flares reported. The elevated electron flux occurred during a period of continuing negative polarity coronal hole high speed stream influences and combined CME influences but was not directly linked to a significant flare or specific solar region as noted in the report.