Solar flares on August 18, 2025
The most powerful solar flare in 24 hours
C2.1 (normal) flare - August 18 at 9:53 PM
Solar activity index
Value as of the end of the day on August 18, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 17, 2025 to August 18, 2025
Time zone — UTC+00
List of solar flares for August 18, 2025
The total number of solar flares of class C and higher — 1 flare
C class — 1 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 21:31 | 21:53 | 22:09 | 4188 |