Solar flares on August 18, 2026
The most powerful solar flare in 24 hours
C3.9 (normal) flare - August 18 at 6:43 AM
Solar activity index
Value as of the end of the day on August 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 17, 2026 to August 18, 2026
Time zone — UTC+00
List of solar flares for August 18, 2026
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.7 | 07:00 | 07:07 | 07:12 | 4506 |
| C3.9 | 06:40 | 06:43 | 06:45 | 4507 |