Solar flares on July 21, 2003
The most powerful solar flare in 24 hours
C3.3 (normal) flare - July 21 at 5:28 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+03 (Tula)
List of solar flares for July 21, 2003
The total number of solar flares of class C and higher — 12 flares
C class — 12 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.7 | 10:36 | 10:39 | 10:41 | — |
| C1.7 | 10:24 | 10:27 | 10:31 | 410 |
| C2.3 | 06:39 | 06:47 | 06:53 | — |
| C1.4 | 06:19 | 06:28 | 06:36 | — |
| C3.3 | 05:19 | 05:28 | 05:34 | 410 |
| C1.3 | 04:50 | 04:55 | 04:58 | — |
| C1.5 | 04:18 | 04:24 | 04:37 | — |
| C1.2 | 04:09 | 04:12 | 04:15 | — |
| C3.2 | 03:28 | 03:35 | 03:41 | 410 |
| C1.8 | 03:04 | 03:08 | 03:21 | 417 |
| C1.6 | 02:37 | 02:41 | 02:44 | — |
| C2.7 | 00:03 | 00:08 | 00:14 | 410 |