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Solar flares — April 21, 2001

April 21, 2001

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Solar flares on April 21, 2001

The most powerful solar flare in 24 hours

C4.8 (normal) flare - April 21 at 12:48 AM

Solar activity index

Value as of the end of the day on April 21, 2001

Solar activity index

Solar X-ray emission over the past 2 days

Chart of solar X-ray emission (1-8 Å) from April 20, 2001 to April 21, 2001

Time zone — UTC-04 (Quebec) — summer time

Solar flares
PNG API: JSON | TXT

List of solar flares for April 21, 2001

The total number of solar flares of class C and higher — 8 flares

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

Class begin max end region
C1.7 21:45 21:48 21:51 9433
C1.8 21:29 21:33 21:41 9433
C3.6 18:33 18:46 18:55 9433
C3.3 18:03 18:07 18:11 9433
C1.7 15:29 15:33 15:36 9433
C1.7 14:05 14:09 14:12 9433
C2.1 12:59 13:07 13:18
C4.8 00:39 00:48 01:08