Solar flares on December 18, 2011
The most powerful solar flare in 24 hours
C1.9 (normal) flare - December 18 at 2:05 AM
Solar activity index
Value as of the end of the day on December 18, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 17, 2011 to December 18, 2011
Time zone — UTC+00 (London)
List of solar flares for December 18, 2011
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.8 | 04:59 | 05:04 | 05:07 | 1376 |
| C1.9 | 02:00 | 02:05 | 02:08 | 1376 |