Solar flares on October 20, 2011
The most powerful solar flare in 24 hours
C5.4 (normal) flare - October 20 at 10:39 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-05 (Pierre) — summer time
List of solar flares for October 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 |
|---|---|---|---|---|
| C5.4 | 10:33 | 10:39 | 10:45 | 1324 |