Solar flares on October 21, 2013
The most powerful solar flare in 24 hours
C2.4 (normal) flare - October 21 at 7:10 PM
Solar activity index
Value as of the end of the day on October 21, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2013 to October 21, 2013
Time zone — UTC+03 (Moscow)
List of solar flares for October 21, 2013
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 23:20 | 23:34 | 23:39 | — |
| C2.4 | 18:40 | 19:10 | 19:16 | 1875 |
| C1.1 | 17:33 | 17:44 | 18:36 | 1877 |
| C1.0 | 12:19 | 12:22 | 12:25 | 1877 |
| C1.6 | 11:09 | 11:13 | 11:17 | 1875 |
| C1.7 | 10:06 | 10:14 | 10:18 | — |
| C1.0 | 01:51 | 01:57 | 02:01 | 1875 |