Solar flares on September 4, 2017
The most powerful solar flare in 24 hours
M5.5 (strong) flare - September 4 at 8:33 PM
Solar activity index
Value as of the end of the day on September 4, 2017
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 3, 2017 to September 4, 2017
Time zone — UTC+00
List of solar flares for September 4, 2017
The total number of solar flares of class C and higher — 15 flares
C class — 8 | M class — 7 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M2.1 | 22:10 | 22:14 | 22:19 | 2673 |
| M5.5 | 20:28 | 20:33 | 20:37 | 2673 |
| M1.5 | 19:59 | 20:02 | 20:06 | 2673 |
| M1.7 | 18:46 | 19:37 | 19:52 | 2673 |
| M1.0 | 18:05 | 18:22 | 18:31 | 2673 |
| C6.0 | 17:20 | 17:39 | 17:48 | 2673 |
| C4.1 | 16:29 | 16:46 | 16:50 | 2673 |
| M1.5 | 15:11 | 15:30 | 15:33 | 2673 |
| C8.3 | 12:12 | 12:25 | 12:33 | 2673 |
| C2.4 | 11:33 | 11:38 | 11:42 | 2673 |
| C2.9 | 08:08 | 08:19 | 08:24 | 2673 |
| M1.2 | 05:36 | 05:49 | 06:05 | 2673 |
| C1.8 | 04:05 | 04:11 | 04:17 | 2673 |
| C1.2 | 03:33 | 03:38 | 03:42 | 2673 |
| C1.1 | 02:18 | 02:22 | 02:29 | 2674 |