Solar flares on July 20, 2003
The most powerful solar flare in 24 hours
C5.6 (normal) flare - July 20 at 4:08 PM
Solar activity index
Value as of the end of the day on July 20, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 19, 2003 to July 20, 2003
Time zone — UTC+00
List of solar flares for July 20, 2003
The total number of solar flares of class C and higher — 21 flares
C class — 21 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 23:37 | 23:41 | 23:44 | — |
| C2.7 | 21:03 | 21:08 | 21:14 | 410 |
| C4.4 | 19:04 | 19:11 | 19:25 | 410 |
| C3.1 | 18:06 | 18:11 | 18:17 | — |
| C3.6 | 17:53 | 17:58 | 18:01 | 410 |
| C3.9 | 17:22 | 17:26 | 17:36 | 410 |
| C3.7 | 16:41 | 16:47 | 16:53 | 410 |
| C5.6 | 16:01 | 16:08 | 16:19 | 410 |
| C1.8 | 15:49 | 15:54 | 15:57 | 410 |
| C3.7 | 14:48 | 14:52 | 14:54 | 410 |
| C2.1 | 12:00 | 12:06 | 12:23 | — |
| C1.7 | 11:52 | 11:55 | 11:57 | — |
| C2.4 | 09:45 | 10:02 | 10:08 | — |
| C2.0 | 08:33 | 08:36 | 08:38 | 417 |
| C2.5 | 08:19 | 08:23 | 08:28 | — |
| C1.4 | 06:19 | 06:25 | 06:35 | — |
| C1.2 | 05:18 | 05:23 | 05:26 | — |
| C1.1 | 04:36 | 04:39 | 04:43 | — |
| C3.9 | 03:48 | 03:56 | 04:10 | 410 |
| C2.8 | 01:09 | 01:15 | 01:22 | 410 |
| C1.8 | 00:26 | 00:30 | 00:34 | 410 |