Solar flares on August 20, 2025
The most powerful solar flare in 24 hours
C2.8 (normal) flare - August 20 at 9:36 AM
Solar activity index
Value as of the end of the day on August 20, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 19, 2025 to August 20, 2025
Time zone — UTC+00 (Reykjavik)
List of solar flares for August 20, 2025
The total number of solar flares of class C and higher — 3 flares
C class — 3 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.3 | 09:52 | 09:57 | 10:01 | — |
| C2.8 | 09:24 | 09:36 | 09:52 | — |
| C2.5 | 02:18 | 02:39 | 02:49 | — |