Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 18 at 10:55 PM
Solar activity index
Value as of the end of the day on September 18, 2023
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 17, 2023 to September 18, 2023
Time zone — UTC-05 (Jackson) — summer time
List of solar flares for September 18, 2023
The total number of solar flares of class C and higher — 18 flares
C class — 17 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.1 | 22:45 | 22:55 | 23:01 | 3435 |
| C3.5 | 22:01 | 22:08 | 22:12 | 3429 |
| C3.9 | 21:28 | 21:43 | 22:01 | 3436 |
| C2.8 | 20:43 | 20:53 | 20:57 | 3436 |
| C2.1 | 19:31 | 19:41 | 19:45 | 3437 |
| C4.9 | 18:20 | 18:25 | 18:29 | 3436 |
| C3.3 | 16:59 | 17:06 | 17:13 | 3436 |
| C3.8 | 15:22 | 15:35 | 15:50 | 3436 |
| C2.4 | 14:35 | 14:46 | 14:54 | 3436 |
| C1.9 | 13:27 | 13:32 | 13:36 | 3436 |
| C1.8 | 13:10 | 13:20 | 13:27 | 3436 |
| C2.0 | 12:35 | 12:43 | 12:53 | 3436 |
| C1.8 | 10:42 | 10:54 | 11:10 | 3436 |
| C2.3 | 09:44 | 09:52 | 10:01 | 3435 |
| C1.5 | 08:20 | 08:38 | 08:59 | — |
| C1.4 | 07:51 | 07:59 | 08:21 | 3429 |
| C2.6 | 05:31 | 05:41 | 05:49 | 3435 |
| C1.6 | 04:27 | 04:35 | 04:43 | 3425 |