Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 18 at 8:55 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-07 (Kamloops) — 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 | 20:45 | 20:55 | 21:01 | 3435 |
| C3.5 | 20:01 | 20:08 | 20:12 | 3429 |
| C3.9 | 19:28 | 19:43 | 20:01 | 3436 |
| C2.8 | 18:43 | 18:53 | 18:57 | 3436 |
| C2.1 | 17:31 | 17:41 | 17:45 | 3437 |
| C4.9 | 16:20 | 16:25 | 16:29 | 3436 |
| C3.3 | 14:59 | 15:06 | 15:13 | 3436 |
| C3.8 | 13:22 | 13:35 | 13:50 | 3436 |
| C2.4 | 12:35 | 12:46 | 12:54 | 3436 |
| C1.9 | 11:27 | 11:32 | 11:36 | 3436 |
| C1.8 | 11:10 | 11:20 | 11:27 | 3436 |
| C2.0 | 10:35 | 10:43 | 10:53 | 3436 |
| C1.8 | 08:42 | 08:54 | 09:10 | 3436 |
| C2.3 | 07:44 | 07:52 | 08:01 | 3435 |
| C1.5 | 06:20 | 06:38 | 06:59 | — |
| C1.4 | 05:51 | 05:59 | 06:21 | 3429 |
| C2.6 | 03:31 | 03:41 | 03:49 | 3435 |
| C1.6 | 02:27 | 02:35 | 02:43 | 3425 |