Solar flares on October 20, 2013
The most powerful solar flare in 24 hours
C2.9 (normal) flare - October 20 at 9:40 AM
Solar activity index
Value as of the end of the day on October 20, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 19, 2013 to October 20, 2013
Time zone — UTC+01 (London) — summer time
List of solar flares for October 20, 2013
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 23:51 | 23:57 | 00:01 | 1875 |
| C1.7 | 19:09 | 19:48 | 20:07 | 1873 |
| C2.0 | 13:41 | 13:45 | 13:50 | 1868 |
| C2.9 | 09:33 | 09:40 | 09:46 | 1868 |
| C2.0 | 00:09 | 00:30 | 00:46 | 1861 |