Solar flares on June 4, 2026
The most powerful solar flare in 24 hours
C5.1 (normal) flare - June 4 at 12:43 AM
Solar activity index
Value as of the end of the day on June 4, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from June 3, 2026 to June 4, 2026
Time zone — UTC+01 (London) — summer time
List of solar flares for June 4, 2026
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.8 | 17:25 | 17:35 | 17:44 | 4452 |
| C1.6 | 16:53 | 16:58 | 17:06 | 4452 |
| C1.5 | 13:50 | 13:58 | 14:09 | 4455 |
| C1.5 | 07:31 | 07:38 | 07:40 | 4446 |
| C1.2 | 07:16 | 07:23 | 07:30 | 4461 |
| C2.6 | 04:41 | 04:57 | 05:06 | 4457 |
| C1.8 | 02:54 | 03:00 | 03:05 | 4458 |
| C5.1 | 00:27 | 00:43 | 01:00 | 4459 |