Solar flares on September 21, 2015
The most powerful solar flare in 24 hours
C8.8 (normal) flare - September 21 at 6:18 AM
Solar activity index
Value as of the end of the day on September 21, 2015
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 20, 2015 to September 21, 2015
Time zone — UTC+01 (London) — summer time
List of solar flares for September 21, 2015
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C8.8 | 06:11 | 06:18 | 06:22 | 2420 |
| C1.5 | 04:54 | 05:00 | 05:05 | 2420 |
| C4.2 | 02:57 | 03:04 | 03:08 | 2420 |
| C2.8 | 01:10 | 01:21 | 01:29 | 2420 |