Solar flares on September 28, 2015
The most powerful solar flare in 24 hours
M7.6 (strong) flare - September 28 at 3:58 PM
Solar activity index
Value as of the end of the day on September 28, 2015
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 27, 2015 to September 28, 2015
Time zone — UTC+01 (London) — summer time
List of solar flares for September 28, 2015
The total number of solar flares of class C and higher — 17 flares
C class — 13 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.4 | 23:28 | 23:32 | 23:37 | — |
| C4.3 | 22:39 | 22:44 | 22:57 | 2422 |
| C7.6 | 21:15 | 21:21 | 21:40 | 2423 |
| C2.8 | 18:08 | 18:11 | 18:14 | 2422 |
| C3.4 | 17:42 | 17:45 | 17:47 | 2422 |
| M7.6 | 15:53 | 15:58 | 16:03 | 2422 |
| C9.8 | 15:12 | 15:33 | 15:45 | 2422 |
| M1.1 | 14:01 | 14:18 | 14:29 | 2422 |
| C5.4 | 13:30 | 13:36 | 13:49 | — |
| C8.1 | 12:52 | 12:57 | 13:00 | — |
| C8.5 | 12:21 | 12:32 | 12:50 | 2422 |
| C3.7 | 09:47 | 10:04 | 10:12 | 2423 |
| M1.1 | 08:27 | 08:35 | 08:46 | 2422 |
| C4.5 | 07:21 | 07:54 | 08:08 | 2423 |
| C2.0 | 05:14 | 06:31 | 06:58 | 2423 |
| M3.6 | 04:45 | 04:55 | 04:59 | 2423 |
| C7.9 | 00:16 | 00:21 | 00:26 | 2422 |