Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
C4.9 (normal) flare - September 18 at 11:25 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+00
List of solar flares for September 18, 2023
The total number of solar flares of class C and higher — 14 flares
C class — 14 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.9 | 23:20 | 23:25 | 23:29 | 3436 |
| C3.3 | 21:59 | 22:06 | 22:13 | 3436 |
| C3.8 | 20:22 | 20:35 | 20:50 | 3436 |
| C2.4 | 19:35 | 19:46 | 19:54 | 3436 |
| C1.9 | 18:27 | 18:32 | 18:36 | 3436 |
| C1.8 | 18:10 | 18:20 | 18:27 | 3436 |
| C2.0 | 17:35 | 17:43 | 17:53 | 3436 |
| C1.8 | 15:42 | 15:54 | 16:10 | 3436 |
| C2.3 | 14:44 | 14:52 | 15:01 | 3435 |
| C1.5 | 13:20 | 13:38 | 13:59 | — |
| C1.4 | 12:51 | 12:59 | 13:21 | 3429 |
| C2.6 | 10:31 | 10:41 | 10:49 | 3435 |
| C1.6 | 09:27 | 09:35 | 09:43 | 3425 |
| C1.5 | 00:56 | 01:04 | 01:09 | 3430 |