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Solar flares — December 18, 2025

December 18, 2025

Today

UTC+00
Home Solar flares December 18, 2025

Solar flares on December 18, 2025

The most powerful solar flare in 24 hours

C3.2 (normal) flare - December 18 at 7:50 AM

Solar activity index

Value as of the end of the day on December 18, 2025

Solar activity index

Solar X-ray emission over the past 2 days

Chart of solar X-ray emission (1-8 Å) from December 17, 2025 to December 18, 2025

Time zone — UTC+00

Solar flares
PNG API: JSON | TXT

List of solar flares for December 18, 2025

The total number of solar flares of class C and higher — 3 flares

C class — 3 | M class — 0 | X class — 0

Class begin max end region
C3.2 07:44 07:50 07:56 4312
C1.7 03:05 03:15 03:31 4308
C1.3 00:02 00:11 00:14 4307