Solar flares on August 17, 2025
The most powerful solar flare in 24 hours
C3.3 (normal) flare - August 17 at 12:58 PM
Solar activity index
Value as of the end of the day on August 17, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 16, 2025 to August 17, 2025
Time zone — UTC-07 (Seattle) — summer time
List of solar flares for August 17, 2025
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.3 | 12:48 | 12:58 | 13:02 | 4180 |
| C1.0 | 01:01 | 01:06 | 01:09 | 4172 |
| C1.4 | 00:36 | 00:41 | 00:44 | 4172 |
| C1.7 | 23:49 | 00:05 | 00:16 | 4172 |