Solar flares on October 21, 2015
The most powerful solar flare in 24 hours
C7.7 (normal) flare - October 21 at 5:56 PM
Solar activity index
Value as of the end of the day on October 21, 2015
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2015 to October 21, 2015
Time zone — UTC+00
List of solar flares for October 21, 2015
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C7.7 | 17:48 | 17:56 | 18:00 | 2436 |
| C1.1 | 14:28 | 14:31 | 14:33 | 2436 |
| C1.7 | 13:52 | 13:58 | 14:04 | 2436 |
| C2.6 | 11:51 | 12:00 | 12:07 | 2436 |
| C2.7 | 05:31 | 05:37 | 05:43 | 2436 |
| C6.3 | 04:29 | 04:34 | 04:36 | 2436 |
| C1.6 | 02:00 | 02:09 | 02:14 | 2436 |
| C1.7 | 00:12 | 00:19 | 00:23 | 2436 |