Solar flares on August 21, 2026
The most powerful solar flare in 24 hours
M1.6 (strong) flare - August 21 at 10:17 AM
Solar activity index
Value as of the end of the day on August 21, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 20, 2026 to August 21, 2026
Time zone — UTC+00
List of solar flares for August 21, 2026
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 |
|---|---|---|---|---|
| C4.0 | 20:45 | 20:59 | 21:07 | 4513 |
| C2.0 | 18:25 | 18:32 | 18:35 | 4513 |
| C3.4 | 17:45 | 17:53 | 18:01 | 4513 |
| M1.6 | 09:09 | 10:17 | 11:49 | 4507 |
| C2.1 | 07:27 | 07:32 | 07:38 | 4507 |
| C1.9 | 07:04 | 07:12 | 07:18 | 4514 |
| C6.2 | 06:26 | 06:35 | 06:41 | 4513 |
| C1.8 | 05:39 | 05:52 | 06:15 | 4513 |
| C1.5 | 05:02 | 05:09 | 05:14 | 4513 |
| C1.3 | 03:47 | 03:52 | 03:57 | 4513 |
| C6.7 | 02:06 | 02:20 | 02:42 | — |
| C4.1 | 01:37 | 02:01 | 02:06 | 4507 |
| C2.4 | 00:13 | 00:25 | 00:35 | 4507 |