Solar flares on December 18, 2002
The most powerful solar flare in 24 hours
M2.4 (strong) flare - December 18 at 7:42 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+01 (Oslo)
List of solar flares for December 18, 2002
The total number of solar flares of class C and higher — 12 flares
C class — 10 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.0 | 23:09 | 23:12 | 23:14 | — |
| C1.6 | 22:25 | 22:28 | 22:33 | — |
| C1.9 | 21:23 | 21:28 | 21:32 | — |
| C1.4 | 20:32 | 20:37 | 20:41 | — |
| C2.7 | 18:27 | 18:31 | 18:40 | — |
| C1.8 | 15:37 | 15:41 | 15:50 | — |
| C7.1 | 12:41 | 12:47 | 12:51 | — |
| M2.4 | 07:31 | 07:42 | 07:56 | 226 |
| C1.6 | 06:40 | 06:45 | 06:52 | 224 |
| C6.9 | 03:29 | 03:33 | 03:36 | 226 |
| C3.5 | 03:21 | 03:25 | 03:27 | 224 |
| M1.6 | 23:57 | 00:35 | 00:45 | 226 |