Solar flares on October 21, 2012
The most powerful solar flare in 24 hours
M1.3 (strong) flare - October 21 at 9:03 PM
Solar activity index
Value as of the end of the day on October 21, 2012
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2012 to October 21, 2012
Time zone — UTC+01 (London) — summer time
List of solar flares for October 21, 2012
The total number of solar flares of class C and higher — 8 flares
C class — 7 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 22:45 | 22:51 | 22:59 | 1598 |
| M1.3 | 20:46 | 21:03 | 21:20 | 1598 |
| C1.2 | 19:42 | 19:45 | 19:48 | 1598 |
| C1.1 | 18:52 | 19:18 | 19:31 | 1598 |
| C1.8 | 13:58 | 14:16 | 14:32 | 1596 |
| C1.1 | 12:06 | 12:09 | 12:18 | 1596 |
| C5.6 | 06:24 | 06:34 | 06:46 | 1598 |
| C7.8 | 03:54 | 04:08 | 04:16 | 1598 |