Solar flares on December 28, 2004
The most powerful solar flare in 24 hours
C7.2 (normal) flare - December 28 at 7:01 PM
Solar activity index
Value as of the end of the day on December 28, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 27, 2004 to December 28, 2004
Time zone — UTC+01 (Prague)
List of solar flares for December 28, 2004
The total number of solar flares of class C and higher — 11 flares
C class — 11 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 21:51 | 21:57 | 21:59 | 713 |
| C1.9 | 21:25 | 21:29 | 21:32 | 715 |
| C7.2 | 18:41 | 19:01 | 19:28 | 715 |
| C4.1 | 16:45 | 16:55 | 17:00 | 713 |
| C4.3 | 13:28 | 13:35 | 13:40 | 713 |
| C1.1 | 11:43 | 11:51 | 11:57 | 713 |
| C3.5 | 10:11 | 10:18 | 10:25 | 713 |
| C1.1 | 10:01 | 10:06 | 10:10 | 713 |
| C2.4 | 07:28 | 07:31 | 07:34 | 713 |
| C2.3 | 07:00 | 07:09 | 07:13 | 713 |
| C7.2 | 01:04 | 01:10 | 01:12 | 713 |