Solar flares on October 20, 2011
The most powerful solar flare in 24 hours
M1.6 (strong) flare - October 20 at 4:25 AM
Solar activity index
Value as of the end of the day on October 20, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 19, 2011 to October 20, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for October 20, 2011
The total number of solar flares of class C and higher — 3 flares
C class — 2 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.4 | 16:33 | 16:39 | 16:45 | 1324 |
| M1.6 | 04:10 | 04:25 | 04:44 | — |
| C1.5 | 03:00 | 03:03 | 03:05 | — |