Solar flares on August 21, 2026
The most powerful solar flare in 24 hours
M1.6 (strong) flare - August 21 at 12:17 PM
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+02 (Valletta) — summer time
List of solar flares for August 21, 2026
The total number of solar flares of class C and higher — 15 flares
C class — 14 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.0 | 22:45 | 22:59 | 23:07 | 4513 |
| C2.0 | 20:25 | 20:32 | 20:35 | 4513 |
| C3.4 | 19:45 | 19:53 | 20:01 | 4513 |
| M1.6 | 11:09 | 12:17 | 13:49 | 4507 |
| C2.1 | 09:27 | 09:32 | 09:38 | 4507 |
| C1.9 | 09:04 | 09:12 | 09:18 | 4514 |
| C6.2 | 08:26 | 08:35 | 08:41 | 4513 |
| C1.8 | 07:39 | 07:52 | 08:15 | 4513 |
| C1.5 | 07:02 | 07:09 | 07:14 | 4513 |
| C1.3 | 05:47 | 05:52 | 05:57 | 4513 |
| C6.7 | 04:06 | 04:20 | 04:42 | — |
| C4.1 | 03:37 | 04:01 | 04:06 | 4507 |
| C2.4 | 02:13 | 02:25 | 02:35 | 4507 |
| C3.5 | 01:34 | 01:44 | 01:47 | 4507 |
| C1.5 | 00:30 | 00:34 | 00:51 | 4513 |