Solar flares on December 18, 2003
The most powerful solar flare in 24 hours
C8.6 (normal) flare - December 18 at 2:31 PM
Solar activity index
Value as of the end of the day on December 18, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 17, 2003 to December 18, 2003
Time zone — UTC+05 (Kurgan)
List of solar flares for December 18, 2003
The total number of solar flares of class C and higher — 13 flares
C class — 13 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.4 | 23:36 | 23:40 | 23:43 | — |
| C1.4 | 19:20 | 19:29 | 19:37 | — |
| C1.0 | 18:43 | 18:51 | 18:59 | — |
| C2.9 | 17:28 | 17:37 | 17:43 | 525 |
| C5.5 | 17:00 | 17:09 | 17:11 | — |
| C1.4 | 16:42 | 16:47 | 16:50 | — |
| C8.6 | 14:19 | 14:31 | 14:37 | 525 |
| C3.4 | 13:39 | 13:43 | 13:47 | — |
| C1.3 | 09:12 | 09:18 | 09:27 | — |
| C2.1 | 06:46 | 06:51 | 06:55 | — |
| C1.3 | 06:01 | 06:12 | 06:26 | — |
| C1.1 | 05:28 | 05:32 | 05:39 | — |
| C1.3 | 01:11 | 01:17 | 01:23 | 525 |