Solar flares on July 21, 2026
The most powerful solar flare in 24 hours
M1.9 (strong) flare - July 21 at 6:27 PM
Solar activity index
Value as of the end of the day on July 21, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 20, 2026 to July 21, 2026
Time zone — UTC+01 (London) — summer time
List of solar flares for July 21, 2026
The total number of solar flares of class C and higher — 17 flares
C class — 16 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.4 | 23:51 | 23:55 | 23:59 | 4493 |
| C2.0 | 23:31 | 23:40 | 23:45 | 4493 |
| C3.1 | 21:27 | 21:33 | 21:39 | — |
| C2.9 | 20:16 | 20:24 | 20:26 | 4493 |
| M1.9 | 18:16 | 18:27 | 18:30 | 4493 |
| C3.3 | 18:04 | 18:07 | 18:13 | — |
| C5.1 | 17:05 | 17:08 | 17:10 | 4493 |
| C3.4 | 15:43 | 15:57 | 16:09 | — |
| C3.1 | 15:31 | 15:38 | 15:43 | 4493 |
| C5.1 | 15:11 | 15:14 | 15:16 | — |
| C4.0 | 12:36 | 12:42 | 12:52 | 4493 |
| C7.7 | 10:40 | 10:56 | 11:05 | — |
| C4.3 | 04:47 | 05:05 | 05:13 | 4493 |
| C2.5 | 02:48 | 02:58 | 03:00 | 4493 |
| C6.5 | 01:38 | 01:51 | 02:01 | 4493 |
| C2.4 | 01:15 | 01:20 | 01:25 | 4493 |
| C7.6 | 00:17 | 00:24 | 00:33 | 4493 |