Solar flares on August 13, 2004
The most powerful solar flare in 24 hours
X1.0 (very strong) flare - August 13 at 11:12 AM
Solar activity index
Value as of the end of the day on August 13, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 12, 2004 to August 13, 2004
Time zone — UTC-07 (Victoria) — summer time
List of solar flares for August 13, 2004
The total number of solar flares of class C and higher — 11 flares
C class — 4 | M class — 6 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| M7.4 | 22:36 | 22:44 | 22:52 | 656 |
| M2.4 | 21:10 | 21:14 | 21:17 | 656 |
| M2.8 | 16:46 | 16:50 | 16:54 | 656 |
| M3.0 | 16:14 | 16:43 | 16:46 | 656 |
| C3.5 | 16:04 | 16:07 | 16:10 | 656 |
| X1.0 | 11:07 | 11:12 | 11:15 | 656 |
| C2.3 | 09:55 | 09:58 | 10:03 | 656 |
| C8.6 | 08:10 | 08:16 | 08:21 | 656 |
| M1.1 | 05:02 | 05:09 | 05:12 | 656 |
| C2.4 | 02:36 | 02:43 | 02:57 | 656 |
| M1.2 | 23:36 | 00:29 | 00:38 | 656 |