Solar flares on August 21, 2017
The most powerful solar flare in 24 hours
C3.0 (normal) flare - August 21 at 1:57 PM
Solar activity index
Value as of the end of the day on August 21, 2017
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 20, 2017 to August 21, 2017
Time zone — UTC-04 (Thunder bay) — summer time
List of solar flares for August 21, 2017
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 |
|---|---|---|---|---|
| C1.5 | 17:47 | 18:38 | 18:58 | 2671 |
| C1.5 | 16:12 | 16:22 | 16:26 | 2671 |
| C3.0 | 13:39 | 13:57 | 14:01 | — |