Solar flares on July 21, 2003
The most powerful solar flare in 24 hours
C5.2 (normal) flare - July 21 at 11:18 PM
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-08 (Anchorage) — summer time
List of solar flares for July 21, 2003
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.2 | 23:06 | 23:18 | 23:30 | 417 |
| C1.5 | 22:05 | 22:32 | 22:49 | 417 |
| C3.5 | 19:45 | 20:10 | 20:20 | — |
| C2.8 | 19:35 | 19:40 | 19:43 | 417 |
| C3.5 | 17:57 | 18:06 | 18:18 | 412 |