Solar flares on December 20, 2001
The most powerful solar flare in 24 hours
C8.7 (normal) flare - December 20 at 10:08 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+05:30 (Indore)
List of solar flares for December 20, 2001
The total number of solar flares of class C and higher — 9 flares
C class — 9 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.0 | 23:38 | 23:42 | 23:48 | 9742 |
| C2.7 | 22:40 | 22:45 | 22:54 | 9742 |
| C4.4 | 20:52 | 20:56 | 21:03 | 9742 |
| C2.4 | 16:33 | 16:36 | 16:42 | — |
| C3.1 | 14:14 | 14:17 | 14:20 | 9741 |
| C8.7 | 10:02 | 10:08 | 10:12 | 9742 |
| C2.4 | 04:28 | 04:33 | 04:40 | — |
| C2.1 | 02:13 | 02:17 | 02:19 | 9738 |
| C2.2 | 01:05 | 01:20 | 01:38 | 9738 |