Solar flares on December 18, 2002
The most powerful solar flare in 24 hours
M2.4 (strong) flare - December 18 at 6:42 AM
Solar activity index
Value as of the end of the day on December 18, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 17, 2002 to December 18, 2002
Time zone — UTC+00
List of solar flares for December 18, 2002
The total number of solar flares of class C and higher — 12 flares
C class — 11 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.2 | 23:54 | 23:58 | 00:02 | 230 |
| C2.0 | 22:09 | 22:12 | 22:14 | — |
| C1.6 | 21:25 | 21:28 | 21:33 | — |
| C1.9 | 20:23 | 20:28 | 20:32 | — |
| C1.4 | 19:32 | 19:37 | 19:41 | — |
| C2.7 | 17:27 | 17:31 | 17:40 | — |
| C1.8 | 14:37 | 14:41 | 14:50 | — |
| C7.1 | 11:41 | 11:47 | 11:51 | — |
| M2.4 | 06:31 | 06:42 | 06:56 | 226 |
| C1.6 | 05:40 | 05:45 | 05:52 | 224 |
| C6.9 | 02:29 | 02:33 | 02:36 | 226 |
| C3.5 | 02:21 | 02:25 | 02:27 | 224 |