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Solar Energetic Particle
Catalog: M2M_CATALOG
Event Time: 2026-08-21T17:33Z ( STEREO A: IMPACT 13-100 MeV )
Activity ID: 2026-08-21T17:33:00-SEP-001 (version 2)
Note: Previous STEREO A: IMPACT 13-100 MeV SEP with ID 2026-08-20T20:23:00-SEP-001 dropped below threshold around 2026-08-21T05:51Z but remained elevated near threshold prior to this second enhancement, due to the M1.6 flare with ID 2026-08-21T09:09:00-FLR-001 and CME with ID 2026-08-21T09:36:00-CME-001 from AR 14507.

Version 1 submitted on 2026-08-21T20:51Z by Tony Iampietro
Version 2 submitted on 2026-08-21T21:06Z by Tony Iampietro

A Notification with ID 20260821-AL-005 was sent on 2026-08-21T20:54Z

All directly linked activities:

2026-08-21T09:09:00-FLR-001
FLR Type: M1.6

2026-08-21T09:36:00-CME-001

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