Solar flares on April 28, 2026
The most powerful solar flare in 24 hours
M1.5 (strong) flare - April 28 at 8:53 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-05 (Madison) — summer time
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 |
|---|---|---|---|---|
| C5.1 | 23:39 | 23:45 | 23:50 | 4420 |
| C3.0 | 22:44 | 22:54 | 23:05 | — |
| C2.1 | 20:00 | 20:08 | 20:12 | 4425 |
| C2.4 | 19:37 | 19:43 | 19:49 | 4420 |
| C1.7 | 19:00 | 19:07 | 19:16 | 4425 |
| C2.0 | 17:39 | 17:47 | 18:04 | 4425 |
| C3.1 | 17:02 | 17:05 | 17:07 | 4420 |
| C2.5 | 14:49 | 14:53 | 14:55 | 4428 |
| C8.1 | 13:43 | 13:49 | 13:53 | 4425 |
| C2.7 | 11:01 | 11:08 | 11:11 | 4420 |
| C4.2 | 10:49 | 10:53 | 10:55 | 4420 |
| C2.6 | 09:30 | 09:33 | 09:36 | 4420 |
| M1.1 | 09:03 | 09:07 | 09:09 | 4420 |
| M1.5 | 08:49 | 08:53 | 08:55 | 4420 |
| M1.0 | 07:17 | 07:23 | 07:29 | 4420 |
| C7.7 | 07:00 | 07:14 | 07:17 | 4420 |
| C9.3 | 06:41 | 06:46 | 06:48 | 4420 |
| C3.1 | 06:12 | 06:18 | 06:21 | 4420 |
| C7.1 | 04:28 | 04:32 | 04:41 | 4420 |
| C9.0 | 04:14 | 04:23 | 04:26 | 4420 |
| C6.0 | 03:09 | 03:17 | 03:22 | 4420 |
| C1.6 | 23:58 | 00:06 | 00:10 | 4424 |