Solar flares on April 28, 2026
The most powerful solar flare in 24 hours
M1.5 (strong) flare - April 28 at 6:53 AM
Solar activity index
Value as of the end of the day on April 28, 2026
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 27, 2026 to April 28, 2026
Time zone — UTC-07 (Phoenix)
List of solar flares for April 28, 2026
The total number of solar flares of class C and higher — 22 flares
C class — 19 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.8 | 23:05 | 23:14 | 23:23 | 4420 |
| C5.1 | 21:39 | 21:45 | 21:50 | 4420 |
| C3.0 | 20:44 | 20:54 | 21:05 | — |
| C2.1 | 18:00 | 18:08 | 18:12 | 4425 |
| C2.4 | 17:37 | 17:43 | 17:49 | 4420 |
| C1.7 | 17:00 | 17:07 | 17:16 | 4425 |
| C2.0 | 15:39 | 15:47 | 16:04 | 4425 |
| C3.1 | 15:02 | 15:05 | 15:07 | 4420 |
| C2.5 | 12:49 | 12:53 | 12:55 | 4428 |
| C8.1 | 11:43 | 11:49 | 11:53 | 4425 |
| C2.7 | 09:01 | 09:08 | 09:11 | 4420 |
| C4.2 | 08:49 | 08:53 | 08:55 | 4420 |
| C2.6 | 07:30 | 07:33 | 07:36 | 4420 |
| M1.1 | 07:03 | 07:07 | 07:09 | 4420 |
| M1.5 | 06:49 | 06:53 | 06:55 | 4420 |
| M1.0 | 05:17 | 05:23 | 05:29 | 4420 |
| C7.7 | 05:00 | 05:14 | 05:17 | 4420 |
| C9.3 | 04:41 | 04:46 | 04:48 | 4420 |
| C3.1 | 04:12 | 04:18 | 04:21 | 4420 |
| C7.1 | 02:28 | 02:32 | 02:41 | 4420 |
| C9.0 | 02:14 | 02:23 | 02:26 | 4420 |
| C6.0 | 01:09 | 01:17 | 01:22 | 4420 |