Solar flares on May 21, 2023
The most powerful solar flare in 24 hours
M2.6 (strong) flare - May 21 at 12:04 PM
Solar activity index
Value as of the end of the day on May 21, 2023
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 20, 2023 to May 21, 2023
Time zone — UTC-04 (Toronto) — summer time
List of solar flares for May 21, 2023
The total number of solar flares of class C and higher — 13 flares
C class — 12 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.7 | 23:30 | 23:41 | 23:50 | 3311 |
| C3.5 | 22:17 | 22:26 | 22:34 | 3305 |
| C8.2 | 20:55 | 21:08 | 21:18 | 3311 |
| C9.8 | 17:36 | 17:57 | 18:13 | 3305 |
| C4.3 | 16:55 | 17:01 | 17:16 | 3305 |
| M2.6 | 11:49 | 12:04 | 12:18 | 3311 |
| C4.6 | 11:04 | 11:17 | 11:29 | 3305 |
| C5.4 | 07:20 | 07:30 | 07:45 | 3305 |
| C4.9 | 04:27 | 04:34 | 04:48 | 3311 |
| C4.5 | 03:40 | 03:59 | 04:12 | 3305 |
| C4.1 | 02:40 | 02:49 | 02:53 | 3305 |
| C3.0 | 01:30 | 01:40 | 02:04 | 3311 |
| C3.0 | 00:57 | 01:03 | 01:08 | 3311 |