Solar flares on June 17, 2025
The most powerful solar flare in 24 hours
X1.2 (very strong) flare - June 17 at 5:49 PM
Solar activity index
Value as of the end of the day on June 17, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from June 16, 2025 to June 17, 2025
Time zone — UTC-04 (Concord) — summer time
List of solar flares for June 17, 2025
The total number of solar flares of class C and higher — 7 flares
C class — 6 | M class — 0 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| C9.2 | 23:03 | 23:13 | 23:21 | 4115 |
| C3.7 | 21:58 | 22:05 | 22:12 | 4117 |
| X1.2 | 17:38 | 17:49 | 17:54 | 4114 |
| C3.4 | 16:48 | 16:59 | 17:11 | — |
| C2.3 | 16:34 | 16:38 | 16:42 | 4114 |
| C5.5 | 04:06 | 04:13 | 04:16 | — |
| C9.9 | 02:14 | 02:21 | 02:27 | — |