Solar flares on July 21, 2002
The most powerful solar flare in 24 hours
C6.7 (normal) flare - July 21 at 12:45 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-07 (Phoenix)
List of solar flares for July 21, 2002
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.5 | 23:33 | 23:39 | 23:52 | — |
| C3.4 | 07:14 | 07:21 | 07:31 | — |
| C1.8 | 06:33 | 06:37 | 06:39 | 35 |
| C6.7 | 00:35 | 00:45 | 00:54 | — |