SEP
26 May 2026, 11:35 GMT
Topic: space_weather
## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - SEP (STEREO A) ## ## Message Issue Date: 2026-05-26T11:35:49Z ## Message ID: 20260526-AL-005 ## ## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly. ## Summary: Solar energetic particle event detected by STEREO A. The flux of 13-100 MeV protons exceeded 10^(-1) pfu/MeV starting at 2026-05-26T04:07Z. NASA spacecraft at orbits near STEREO A can be impacted. Activity ID: 2026-05-26T04:07:00-SEP-001. ## Notes: This SEP event (2026-05-26T04:07:00-SEP-001) is associated with O-type CME with ID 2026-05-25T22:12:00-CME-001 (see notification 20260526-AL-002).