Solar flares on August 13, 2004
The most powerful solar flare in 24 hours
X1.0 (very strong) flare - August 13 at 6:12 PM
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+00
List of solar flares for August 13, 2004
The total number of solar flares of class C and higher — 11 flares
C class — 6 | M class — 4 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| M2.8 | 23:46 | 23:50 | 23:54 | 656 |
| M3.0 | 23:14 | 23:43 | 23:46 | 656 |
| C3.5 | 23:04 | 23:07 | 23:10 | 656 |
| X1.0 | 18:07 | 18:12 | 18:15 | 656 |
| C2.3 | 16:55 | 16:58 | 17:03 | 656 |
| C8.6 | 15:10 | 15:16 | 15:21 | 656 |
| M1.1 | 12:02 | 12:09 | 12:12 | 656 |
| C2.4 | 09:36 | 09:43 | 09:57 | 656 |
| M1.2 | 06:36 | 07:29 | 07:38 | 656 |
| C1.9 | 02:52 | 02:55 | 02:58 | 656 |
| C2.2 | 00:56 | 01:02 | 01:08 | 656 |