Solar flares on August 21, 2017
The most powerful solar flare in 24 hours
C3.0 (normal) flare - August 21 at 11:57 AM
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-06 (El Paso) — 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 | 15:47 | 16:38 | 16:58 | 2671 |
| C1.5 | 14:12 | 14:22 | 14:26 | 2671 |
| C3.0 | 11:39 | 11:57 | 12:01 | — |