Solar flares on December 18, 2007
The most powerful solar flare in 24 hours
C2.1 (normal) flare - December 18 at 8:20 AM
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-05 (Detroit)
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 | 14:07 | 14:15 | 14:21 | — |
| C1.1 | 09:47 | 09:52 | 09:56 | — |
| C2.1 | 08:08 | 08:20 | 08:29 | — |