Solar flares on May 21, 2001
The most powerful solar flare in 24 hours
C1.7 (normal) flare - May 21 at 12:10 AM
Solar activity index
Value as of the end of the day on May 21, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 20, 2001 to May 21, 2001
Time zone — UTC-08 (Anchorage) — summer time
List of solar flares for May 21, 2001
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.5 | 01:08 | 01:19 | 01:24 | — |
| C1.7 | 23:35 | 00:10 | 01:07 | — |