Solar flares on June 18, 2026
The most powerful solar flare in 24 hours
C2.0 (normal) flare - June 18 at 7:56 AM
Solar activity index
Value as of the end of the day on June 18, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from June 17, 2026 to June 18, 2026
Time zone — UTC-04 (Concord) — summer time
List of solar flares for June 18, 2026
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.2 | 17:49 | 18:04 | 18:18 | 4472 |
| C2.0 | 07:42 | 07:56 | 08:01 | — |
| C1.8 | 07:42 | 07:50 | 08:02 | 4470 |
| C1.0 | 03:38 | 03:46 | 03:52 | 4470 |