Solar flares on October 21, 2000
The most powerful solar flare in 24 hours
M3.0 (strong) flare - October 21 at 6:31 PM
Solar activity index
Value as of the end of the day on October 21, 2000
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2000 to October 21, 2000
Time zone — UTC+00
List of solar flares for October 21, 2000
The total number of solar flares of class C and higher — 6 flares
C class — 5 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M3.0 | 18:13 | 18:31 | 18:46 | 9201 |
| C2.3 | 13:59 | 14:06 | 14:10 | 9201 |
| C5.6 | 09:51 | 09:56 | 10:03 | 9199 |
| C2.4 | 06:57 | 07:01 | 07:06 | 9201 |
| C1.6 | 05:00 | 05:26 | 06:13 | 9199 |
| C1.0 | 01:24 | 01:29 | 01:34 | — |