Solar flares on July 21, 2002
The most powerful solar flare in 24 hours
C7.9 (normal) flare - July 21 at 5:10 AM
Solar activity index
Value as of the end of the day on July 21, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 20, 2002 to July 21, 2002
Time zone — UTC+02 (Berlin) — summer time
List of solar flares for July 21, 2002
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 |
|---|---|---|---|---|
| C3.4 | 16:14 | 16:21 | 16:31 | — |
| C1.8 | 15:33 | 15:37 | 15:39 | 35 |
| C6.7 | 09:35 | 09:45 | 09:54 | — |
| C6.7 | 08:05 | 08:13 | 08:24 | — |
| C7.9 | 05:07 | 05:10 | 05:12 | — |