Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 18 at 11:55 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-04 (Salluit) — 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 | 23:45 | 23:55 | 00:01 | 3435 |
| C3.5 | 23:01 | 23:08 | 23:12 | 3429 |
| C3.9 | 22:28 | 22:43 | 23:01 | 3436 |
| C2.8 | 21:43 | 21:53 | 21:57 | 3436 |
| C2.1 | 20:31 | 20:41 | 20:45 | 3437 |
| C4.9 | 19:20 | 19:25 | 19:29 | 3436 |
| C3.3 | 17:59 | 18:06 | 18:13 | 3436 |
| C3.8 | 16:22 | 16:35 | 16:50 | 3436 |
| C2.4 | 15:35 | 15:46 | 15:54 | 3436 |
| C1.9 | 14:27 | 14:32 | 14:36 | 3436 |
| C1.8 | 14:10 | 14:20 | 14:27 | 3436 |
| C2.0 | 13:35 | 13:43 | 13:53 | 3436 |
| C1.8 | 11:42 | 11:54 | 12:10 | 3436 |
| C2.3 | 10:44 | 10:52 | 11:01 | 3435 |
| C1.5 | 09:20 | 09:38 | 09:59 | — |
| C1.4 | 08:51 | 08:59 | 09:21 | 3429 |
| C2.6 | 06:31 | 06:41 | 06:49 | 3435 |
| C1.6 | 05:27 | 05:35 | 05:43 | 3425 |