Solar flares on September 20, 2023
The most powerful solar flare in 24 hours
M8.2 (strong) flare - September 20 at 9:19 AM
Solar activity index
Value as of the end of the day on September 20, 2023
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 19, 2023 to September 20, 2023
Time zone — UTC-05 (Memphis) — summer time
List of solar flares for September 20, 2023
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.2 | 20:32 | 20:43 | 21:06 | 3442 |
| C2.3 | 18:17 | 18:21 | 18:25 | 3438 |
| C4.7 | 16:27 | 16:38 | 16:48 | 3442 |
| C1.3 | 15:29 | 15:38 | 15:44 | — |
| C5.5 | 13:36 | 13:40 | 13:44 | 3438 |
| C4.2 | 12:34 | 13:02 | 13:24 | 3442 |
| M8.2 | 09:11 | 09:19 | 09:25 | 3435 |
| C3.4 | 07:09 | 07:12 | 07:17 | 3438 |
| C3.1 | 04:03 | 04:10 | 04:15 | 3437 |
| C2.3 | 01:38 | 01:52 | 02:08 | 3429 |