Solar flares on August 18, 2026
The most powerful solar flare in 24 hours
C5.0 (normal) flare - August 18 at 9:54 PM
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-07 (Seattle) — summer time
List of solar flares for August 18, 2026
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.3 | 23:31 | 23:36 | 23:50 | 4507 |
| C5.0 | 21:45 | 21:54 | 22:03 | — |
| C3.0 | 20:30 | 20:46 | 21:01 | — |
| C3.9 | 19:51 | 19:56 | 19:58 | 4507 |
| C2.0 | 19:27 | 19:31 | 19:33 | 4507 |
| C3.9 | 17:06 | 17:37 | 18:12 | 4507 |
| C2.8 | 16:28 | 16:40 | 16:51 | — |
| C2.3 | 15:38 | 15:43 | 15:46 | 4507 |
| C2.0 | 12:51 | 12:56 | 12:59 | 4507 |
| C1.7 | 00:00 | 00:07 | 00:12 | 4506 |