Solar flares on December 20, 2001
The most powerful solar flare in 24 hours
C8.7 (normal) flare - December 20 at 4:38 AM
Solar activity index
Value as of the end of the day on December 20, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 19, 2001 to December 20, 2001
Time zone — UTC+00
List of solar flares for December 20, 2001
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.0 | 18:08 | 18:12 | 18:18 | 9742 |
| C2.7 | 17:10 | 17:15 | 17:24 | 9742 |
| C4.4 | 15:22 | 15:26 | 15:33 | 9742 |
| C2.4 | 11:03 | 11:06 | 11:12 | — |
| C3.1 | 08:44 | 08:47 | 08:50 | 9741 |
| C8.7 | 04:32 | 04:38 | 04:42 | 9742 |