Solar flares on April 28, 2003
The most powerful solar flare in 24 hours
C4.4 (normal) flare - April 28 at 12:36 AM
Solar activity index
Value as of the end of the day on April 28, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 27, 2003 to April 28, 2003
Time zone — UTC-04 (Thunder bay) — summer time
List of solar flares for April 28, 2003
The total number of solar flares of class C and higher — 9 flares
C class — 9 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.4 | 20:55 | 21:15 | 21:32 | 338 |
| C1.0 | 20:22 | 20:25 | 20:31 | 337 |
| C1.8 | 17:22 | 17:30 | 17:42 | — |
| C3.3 | 14:11 | 14:18 | 14:24 | 344 |
| C2.0 | 13:14 | 13:19 | 13:26 | 338 |
| C2.1 | 11:10 | 11:46 | 12:02 | 337 |
| C1.3 | 10:05 | 10:17 | 10:23 | 338 |
| C1.5 | 06:10 | 06:17 | 06:26 | 338 |
| C4.4 | 23:57 | 00:36 | 01:20 | 337 |