Solar flares on June 18, 2025
The most powerful solar flare in 24 hours
C9.2 (normal) flare - June 18 at 12:13 AM
Solar activity index
Value as of the end of the day on June 18, 2025
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from June 17, 2025 to June 18, 2025
Time zone — UTC-03 (Saint john) — summer time
List of solar flares for June 18, 2025
The total number of solar flares of class C and higher — 20 flares
C class — 20 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.7 | 22:23 | 22:30 | 22:36 | — |
| C4.1 | 20:06 | 20:13 | 20:17 | 4114 |
| C1.2 | 19:48 | 19:51 | 19:53 | — |
| C3.0 | 18:34 | 18:39 | 18:43 | 4114 |
| C2.0 | 17:37 | 17:46 | 17:49 | 4114 |
| C1.5 | 15:54 | 16:01 | 16:04 | — |
| C1.9 | 15:17 | 15:22 | 15:27 | — |
| C1.6 | 15:03 | 15:07 | 15:11 | — |
| C3.0 | 13:07 | 13:16 | 13:28 | 4114 |
| C2.1 | 12:23 | 12:31 | 12:43 | 4114 |
| C2.6 | 11:00 | 11:07 | 11:13 | 4117 |
| C5.2 | 09:28 | 09:34 | 09:37 | 4117 |
| C4.7 | 08:09 | 08:31 | 08:40 | 4114 |
| C6.9 | 06:14 | 06:30 | 06:55 | 4117 |
| C3.9 | 05:30 | 05:36 | 05:46 | 4117 |
| C5.5 | 03:20 | 03:25 | 03:27 | — |
| C5.5 | 02:38 | 03:14 | 03:20 | — |
| C4.7 | 02:23 | 02:33 | 02:38 | 4117 |
| C4.1 | 02:04 | 02:12 | 02:23 | 4117 |
| C9.2 | 00:03 | 00:13 | 00:21 | 4115 |