Solar flares on July 20, 2004
The most powerful solar flare in 24 hours
M8.6 (strong) flare - July 20 at 12:32 PM
Solar activity index
Value as of the end of the day on July 20, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 19, 2004 to July 20, 2004
Time zone — UTC+00
List of solar flares for July 20, 2004
The total number of solar flares of class C and higher — 9 flares
C class — 8 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C8.1 | 21:09 | 21:23 | 21:34 | 652 |
| C3.8 | 18:15 | 18:21 | 18:28 | 652 |
| M8.6 | 12:22 | 12:32 | 12:45 | 652 |
| C6.0 | 11:01 | 11:26 | 11:37 | 652 |
| C2.3 | 06:31 | 06:48 | 07:02 | — |
| C1.6 | 06:18 | 06:22 | 06:24 | — |
| C1.4 | 04:53 | 04:57 | 05:00 | 652 |
| C2.3 | 04:11 | 04:23 | 04:30 | 652 |
| C3.3 | 00:55 | 01:01 | 01:10 | 649 |