Solar flares on October 15, 2011
The most powerful solar flare in 24 hours
C5.0 (normal) flare - October 15 at 3:13 PM
Solar activity index
Value as of the end of the day on October 15, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 14, 2011 to October 15, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for October 15, 2011
The total number of solar flares of class C and higher — 11 flares
C class — 11 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.9 | 21:35 | 21:47 | 21:56 | — |
| C1.5 | 19:13 | 19:19 | 19:25 | 1316 |
| C1.3 | 18:24 | 18:30 | 18:43 | — |
| C2.3 | 17:10 | 17:21 | 17:26 | 1319 |
| C5.0 | 14:56 | 15:13 | 15:20 | 1319 |
| C2.0 | 14:18 | 14:25 | 14:33 | 1319 |
| C1.6 | 13:36 | 13:39 | 13:41 | 1314 |
| C1.1 | 12:07 | 12:24 | 12:48 | 1313 |
| C2.3 | 05:19 | 06:00 | 06:04 | 1318 |
| C1.3 | 02:07 | 02:12 | 02:21 | 1319 |
| C1.1 | 00:13 | 00:16 | 00:20 | 1319 |