Solar flares on August 20, 2011
The most powerful solar flare in 24 hours
C2.9 (normal) flare - August 20 at 11:58 PM
Solar activity index
Value as of the end of the day on August 20, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 19, 2011 to August 20, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for August 20, 2011
The total number of solar flares of class C and higher — 1 flare
C class — 1 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.9 | 23:54 | 23:58 | 00:00 | 1271 |