SEPMinor2 Linked

Solar Energetic Particle Event

Friday, August 21, 2026

Overview

A solar energetic particle event was observed on Friday, August 21, 2026 by STEREO A: IMPACT 13-100 MeV.

Key Measurements

Date

Friday, August 21, 2026

Time (UTC)

17:33:00 UTC

Instruments

1

Severity

Minor

Start Time

17:33:00 UTC

Friday, August 21, 2026

Submission Time

2026-08-21T21:06Z

Instrument Sources

STEREO A: IMPACT 13-100 MeV
View DONKI record

This event is connected to other space weather activity:

Solar Flare

2026-08-21T09:09:00-FLR-001

Coronal Mass Ejection

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

Data Sources
NASA DONKI SearchNOAA SWPC

Event ID: 2026-08-21T17:33:00-SEP-001