Solar flares on December 18, 2007
The most powerful solar flare in 24 hours
C2.1 (normal) flare - December 18 at 4:20 PM
Solar activity index
Value as of the end of the day on December 18, 2007
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 17, 2007 to December 18, 2007
Time zone — UTC+03 (Moscow)
List of solar flares for December 18, 2007
The total number of solar flares of class C and higher — 3 flares
C class — 3 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 22:07 | 22:15 | 22:21 | — |
| C1.1 | 17:47 | 17:52 | 17:56 | — |
| C2.1 | 16:08 | 16:20 | 16:29 | — |