Solar flares on May 18, 2026
The most powerful solar flare in 24 hours
C1.9 (normal) flare - May 18 at 6:28 PM
Solar activity index
Value as of the end of the day on May 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 17, 2026 to May 18, 2026
Time zone — UTC+00
List of solar flares for May 18, 2026
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 |
|---|---|---|---|---|
| C1.9 | 18:10 | 18:28 | 18:45 | 4436 |