Solar flares on September 18, 2023
The most powerful solar flare in 24 hours
C3.8 (normal) flare - September 18 at 10:35 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+02 (Berlin) — summer time
List of solar flares for September 18, 2023
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.8 | 22:22 | 22:35 | 22:50 | 3436 |
| C2.4 | 21:35 | 21:46 | 21:54 | 3436 |
| C1.9 | 20:27 | 20:32 | 20:36 | 3436 |
| C1.8 | 20:10 | 20:20 | 20:27 | 3436 |
| C2.0 | 19:35 | 19:43 | 19:53 | 3436 |
| C1.8 | 17:42 | 17:54 | 18:10 | 3436 |
| C2.3 | 16:44 | 16:52 | 17:01 | 3435 |
| C1.5 | 15:20 | 15:38 | 15:59 | — |
| C1.4 | 14:51 | 14:59 | 15:21 | 3429 |
| C2.6 | 12:31 | 12:41 | 12:49 | 3435 |
| C1.6 | 11:27 | 11:35 | 11:43 | 3425 |
| C1.5 | 02:56 | 03:04 | 03:09 | 3430 |