Solar flares on December 21, 2003
The most powerful solar flare in 24 hours
C4.5 (normal) flare - December 21 at 2:46 AM
Solar activity index
Value as of the end of the day on December 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 20, 2003 to December 21, 2003
Time zone — UTC+00
List of solar flares for December 21, 2003
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 21:24 | 21:30 | 21:36 | 528 |
| C2.0 | 12:53 | 12:57 | 13:01 | 528 |
| C2.1 | 10:14 | 10:18 | 10:25 | 525 |
| C2.0 | 04:10 | 04:16 | 04:21 | 0 |
| C4.5 | 02:38 | 02:46 | 03:14 | 528 |