Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
M1.1 (strong) flare - September 18 at 7:55 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-08 (Dillingham) — 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 | 19:45 | 19:55 | 20:01 | 3435 |
| C3.5 | 19:01 | 19:08 | 19:12 | 3429 |
| C3.9 | 18:28 | 18:43 | 19:01 | 3436 |
| C2.8 | 17:43 | 17:53 | 17:57 | 3436 |
| C2.1 | 16:31 | 16:41 | 16:45 | 3437 |
| C4.9 | 15:20 | 15:25 | 15:29 | 3436 |
| C3.3 | 13:59 | 14:06 | 14:13 | 3436 |
| C3.8 | 12:22 | 12:35 | 12:50 | 3436 |
| C2.4 | 11:35 | 11:46 | 11:54 | 3436 |
| C1.9 | 10:27 | 10:32 | 10:36 | 3436 |
| C1.8 | 10:10 | 10:20 | 10:27 | 3436 |
| C2.0 | 09:35 | 09:43 | 09:53 | 3436 |
| C1.8 | 07:42 | 07:54 | 08:10 | 3436 |
| C2.3 | 06:44 | 06:52 | 07:01 | 3435 |
| C1.5 | 05:20 | 05:38 | 05:59 | — |
| C1.4 | 04:51 | 04:59 | 05:21 | 3429 |
| C2.6 | 02:31 | 02:41 | 02:49 | 3435 |
| C1.6 | 01:27 | 01:35 | 01:43 | 3425 |