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Solar flares — April 21, 2026

April 21, 2026

Today

UTC+00
Home Solar flares April 21, 2026

Solar flares on April 21, 2026

The most powerful solar flare in 24 hours

C5.3 (normal) flare - April 21 at 6:02 AM

Solar activity index

Value as of the end of the day on April 21, 2026

Solar activity index

Solar X-ray emission over the past 2 days

Chart of solar X-ray emission (1-8 Å) from April 20, 2026 to April 21, 2026

Time zone — UTC+00

Solar flares
PNG API: JSON | TXT

List of solar flares for April 21, 2026

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
C1.1 23:13 23:20 23:25
C1.9 21:20 21:25 21:37 4420
C1.7 18:25 18:36 18:49 4420
C1.4 16:29 16:43 16:56 4420
C1.9 14:15 14:24 14:40 4420
C1.4 13:41 14:02 14:12 4420
C4.0 11:45 11:50 11:55 4420
C2.2 11:25 11:30 11:42 4420
C1.6 09:42 09:56 10:06 4420
C1.4 06:47 06:55 07:00 4420
C5.3 05:53 06:02 06:08 4421
C1.3 01:03 01:15 01:24