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Solar flares — September 23, 2025

September 23, 2025

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Solar flares on September 23, 2025

The most powerful solar flare in 24 hours

M1.0 (strong) flare - September 23 at 3:34 AM

Solar activity index

Value as of the end of the day on September 23, 2025

Solar activity index

Solar X-ray emission over the past 2 days

Chart of solar X-ray emission (1-8 Å) from September 22, 2025 to September 23, 2025

Time zone — UTC-07 (Seattle) — summer time

Solar flares
PNG API: JSON | TXT

List of solar flares for September 23, 2025

The total number of solar flares of class C and higher — 9 flares

C class — 8 | M class — 1 | X class — 0

Class begin max end region
C2.5 20:44 20:51 21:01
C5.5 20:23 20:31 20:37 4226
C6.7 19:15 19:29 19:40 4223
C2.9 18:15 18:41 19:00 4224
C2.3 18:01 18:08 18:15 4224
C2.0 15:34 15:43 15:54 4224
C1.9 11:17 11:25 11:41 4230
M1.0 03:24 03:34 03:38 4217
C2.5 02:07 02:20 02:34 4228