Solar flares on October 21, 2014
The most powerful solar flare in 24 hours
M8.7 (strong) flare - October 21 at 9:59 PM
Solar activity index
Value as of the end of the day on October 21, 2014
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2014 to October 21, 2014
Time zone — UTC-04 (Ottawa) — summer time
List of solar flares for October 21, 2014
The total number of solar flares of class C and higher — 10 flares
C class — 8 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M8.7 | 21:16 | 21:59 | 22:28 | 2192 |
| C3.4 | 17:54 | 18:04 | 18:14 | 2192 |
| C6.5 | 16:11 | 16:20 | 16:25 | 2192 |
| C4.0 | 15:03 | 15:10 | 15:16 | 2192 |
| M1.2 | 09:35 | 09:38 | 09:40 | — |
| C4.4 | 08:25 | 08:28 | 08:30 | — |
| C6.3 | 06:46 | 06:58 | 07:13 | — |
| C3.1 | 04:08 | 04:10 | 04:12 | 2192 |
| C2.9 | 02:53 | 02:57 | 03:02 | 2192 |
| C5.7 | 02:05 | 02:14 | 02:21 | 2192 |