Solar flares on December 21, 2003
The most powerful solar flare in 24 hours
C5.5 (normal) flare - December 21 at 5:45 PM
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-07 (El Paso)
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 |
|---|---|---|---|---|
| C2.2 | 23:36 | 23:54 | 00:11 | 530 |
| C5.5 | 17:39 | 17:45 | 17:49 | 528 |
| C1.1 | 14:24 | 14:30 | 14:36 | 528 |
| C2.0 | 05:53 | 05:57 | 06:01 | 528 |
| C2.1 | 03:14 | 03:18 | 03:25 | 525 |