Solar flares on May 17, 2026
The most powerful solar flare in 24 hours
M1.4 (strong) flare - May 17 at 3:39 AM
Solar activity index
Value as of the end of the day on May 17, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 16, 2026 to May 17, 2026
Time zone — UTC+00
List of solar flares for May 17, 2026
The total number of solar flares of class C and higher — 7 flares
C class — 6 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.7 | 20:42 | 20:53 | 21:05 | 4436 |
| C1.1 | 12:25 | 12:38 | 12:57 | 4438 |
| C1.0 | 12:01 | 12:07 | 12:10 | 4439 |
| C1.1 | 11:23 | 11:32 | 11:40 | 4436 |
| C2.0 | 05:21 | 05:32 | 05:37 | — |
| C1.0 | 04:36 | 04:44 | 04:52 | — |
| M1.4 | 03:29 | 03:39 | 03:42 | 4435 |