Solar flares on July 21, 2003
The most powerful solar flare in 24 hours
C3.3 (normal) flare - July 21 at 2:28 AM
Solar activity index
Value as of the end of the day on July 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 20, 2003 to July 21, 2003
Time zone — UTC+00
List of solar flares for July 21, 2003
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.7 | 07:36 | 07:39 | 07:41 | — |
| C1.7 | 07:24 | 07:27 | 07:31 | 410 |
| C2.3 | 03:39 | 03:47 | 03:53 | — |
| C1.4 | 03:19 | 03:28 | 03:36 | — |
| C3.3 | 02:19 | 02:28 | 02:34 | 410 |
| C1.3 | 01:50 | 01:55 | 01:58 | — |
| C1.5 | 01:18 | 01:24 | 01:37 | — |
| C1.2 | 01:09 | 01:12 | 01:15 | — |
| C3.2 | 00:28 | 00:35 | 00:41 | 410 |
| C1.8 | 00:04 | 00:08 | 00:21 | 417 |