Solar flares on August 13, 2025
The most powerful solar flare in 24 hours
C4.1 (normal) flare - August 13 at 8:03 PM
Solar activity index
Value as of the end of the day on August 13, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 12, 2025 to August 13, 2025
Time zone — UTC+00
List of solar flares for August 13, 2025
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.1 | 19:57 | 20:03 | 20:05 | 4172 |
| C3.2 | 18:11 | 18:19 | 18:25 | 4172 |
| C1.8 | 17:55 | 18:01 | 18:04 | 4172 |
| C1.5 | 15:58 | 16:01 | 16:04 | — |
| C1.7 | 15:38 | 15:42 | 15:58 | — |
| C2.6 | 14:46 | 14:56 | 14:59 | 4172 |
| C1.8 | 14:28 | 14:35 | 14:46 | — |
| C1.8 | 10:30 | 10:39 | 10:43 | 4180 |
| C1.7 | 10:17 | 10:21 | 10:30 | 4172 |
| C2.1 | 04:26 | 04:35 | 04:39 | 4178 |
| C2.3 | 03:23 | 03:30 | 03:32 | 4178 |
| C2.9 | 01:29 | 01:42 | 01:44 | 4178 |