Solar flares on December 18, 2001
The most powerful solar flare in 24 hours
C4.9 (normal) flare - December 18 at 8:32 PM
Solar activity index
Value as of the end of the day on December 18, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 17, 2001 to December 18, 2001
Time zone — UTC-06 (Lincoln)
List of solar flares for December 18, 2001
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.6 | 22:52 | 23:17 | 23:48 | 9742 |
| C4.9 | 20:29 | 20:32 | 20:36 | 9742 |
| C3.9 | 19:11 | 19:15 | 19:24 | 9733 |
| C3.7 | 13:59 | 14:03 | 14:07 | 9742 |
| C4.8 | 01:49 | 01:54 | 02:07 | 9733 |
| C1.6 | 01:32 | 01:36 | 01:42 | — |