Solar flares on July 28, 2002
The most powerful solar flare in 24 hours
M4.8 (strong) flare - July 28 at 7:38 PM
Solar activity index
Value as of the end of the day on July 28, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 27, 2002 to July 28, 2002
Time zone — UTC-07 (Phoenix)
List of solar flares for July 28, 2002
The total number of solar flares of class C and higher — 14 flares
C class — 11 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.9 | 23:21 | 23:26 | 23:34 | 39 |
| M4.8 | 19:29 | 19:38 | 19:46 | — |
| M1.4 | 17:19 | 17:23 | 17:27 | — |
| M2.2 | 15:58 | 16:12 | 16:24 | — |
| C5.1 | 13:37 | 13:50 | 14:08 | 43 |
| C6.4 | 13:02 | 13:15 | 13:22 | — |
| C7.1 | 11:49 | 11:54 | 11:58 | — |
| C4.0 | 09:59 | 10:06 | 10:12 | — |
| C2.9 | 08:41 | 09:00 | 09:16 | — |
| C2.3 | 07:55 | 08:00 | 08:04 | 39 |
| C2.2 | 04:35 | 04:41 | 04:45 | 50 |
| C7.6 | 04:01 | 04:06 | 04:10 | 39 |
| C2.2 | 03:45 | 03:49 | 03:51 | 50 |
| C3.6 | 01:38 | 01:44 | 01:49 | 44 |