Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 18 at 9:55 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-06 (Red deer) — 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 | 21:45 | 21:55 | 22:01 | 3435 |
| C3.5 | 21:01 | 21:08 | 21:12 | 3429 |
| C3.9 | 20:28 | 20:43 | 21:01 | 3436 |
| C2.8 | 19:43 | 19:53 | 19:57 | 3436 |
| C2.1 | 18:31 | 18:41 | 18:45 | 3437 |
| C4.9 | 17:20 | 17:25 | 17:29 | 3436 |
| C3.3 | 15:59 | 16:06 | 16:13 | 3436 |
| C3.8 | 14:22 | 14:35 | 14:50 | 3436 |
| C2.4 | 13:35 | 13:46 | 13:54 | 3436 |
| C1.9 | 12:27 | 12:32 | 12:36 | 3436 |
| C1.8 | 12:10 | 12:20 | 12:27 | 3436 |
| C2.0 | 11:35 | 11:43 | 11:53 | 3436 |
| C1.8 | 09:42 | 09:54 | 10:10 | 3436 |
| C2.3 | 08:44 | 08:52 | 09:01 | 3435 |
| C1.5 | 07:20 | 07:38 | 07:59 | — |
| C1.4 | 06:51 | 06:59 | 07:21 | 3429 |
| C2.6 | 04:31 | 04:41 | 04:49 | 3435 |
| C1.6 | 03:27 | 03:35 | 03:43 | 3425 |