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Solar flares — December 11, 2025

December 11, 2025

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UTC+00
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Solar flares on December 11, 2025

The most powerful solar flare in 24 hours

C9.7 (normal) flare - December 11 at 3:46 PM

Solar activity index

Value as of the end of the day on December 11, 2025

Solar activity index

Solar X-ray emission over the past 2 days

Chart of solar X-ray emission (1-8 Å) from December 10, 2025 to December 11, 2025

Time zone — UTC+00

Solar flares
PNG API: JSON | TXT

List of solar flares for December 11, 2025

The total number of solar flares of class C and higher — 12 flares

C class — 12 | M class — 0 | X class — 0

Class begin max end region
C2.4 23:35 23:45 23:53 4305
C2.3 22:26 22:32 22:35 4294
C1.8 21:35 21:46 21:53 4296
C2.4 17:08 17:11 17:14 4294
C9.7 15:39 15:46 15:51 4294
C4.5 15:16 15:21 15:25 4294
C2.3 12:06 12:12 12:14 4299
C2.4 10:16 10:22 10:38 4294
C5.0 09:34 09:38 09:40 4299
C2.4 09:19 09:29 09:32 4294
C1.7 06:09 06:15 06:18
C2.0 02:48 02:51 02:55 4294