Solar flares on April 28, 2013
The most powerful solar flare in 24 hours
C4.4 (normal) flare - April 28 at 4:17 PM
Solar activity index
Value as of the end of the day on April 28, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 27, 2013 to April 28, 2013
Time zone — UTC-04 (Oshawa) — summer time
List of solar flares for April 28, 2013
The total number of solar flares of class C and higher — 16 flares
C class — 16 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.9 | 23:40 | 23:44 | 23:49 | — |
| C3.0 | 23:10 | 23:17 | 23:21 | 1731 |
| C3.0 | 22:24 | 22:46 | 22:54 | 1732 |
| C1.2 | 21:55 | 22:01 | 22:07 | — |
| C1.7 | 19:55 | 20:05 | 20:13 | 1731 |
| C3.1 | 19:27 | 19:31 | 19:33 | 1731 |
| C1.3 | 17:32 | 17:40 | 17:43 | 1731 |
| C1.5 | 16:59 | 17:03 | 17:07 | 1731 |
| C4.4 | 16:10 | 16:17 | 16:26 | 1733 |
| C3.6 | 14:00 | 14:04 | 14:06 | 1731 |
| C1.8 | 12:58 | 13:02 | 13:04 | 1731 |
| C3.7 | 11:52 | 11:55 | 11:58 | 1731 |
| C1.8 | 11:38 | 11:44 | 11:49 | 1731 |
| C1.9 | 10:53 | 10:56 | 10:59 | 1731 |
| C1.1 | 10:35 | 10:38 | 10:41 | 1731 |
| C2.1 | 02:07 | 02:13 | 02:17 | 1731 |