Solar flares on December 20, 2001
The most powerful solar flare in 24 hours
C8.7 (normal) flare - December 20 at 7:38 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+03 (Simferopol)
List of solar flares for December 20, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.0 | 21:08 | 21:12 | 21:18 | 9742 |
| C2.7 | 20:10 | 20:15 | 20:24 | 9742 |
| C4.4 | 18:22 | 18:26 | 18:33 | 9742 |
| C2.4 | 14:03 | 14:06 | 14:12 | — |
| C3.1 | 11:44 | 11:47 | 11:50 | 9741 |
| C8.7 | 07:32 | 07:38 | 07:42 | 9742 |
| C2.4 | 01:58 | 02:03 | 02:10 | — |