Solar flares on July 21, 2004
The most powerful solar flare in 24 hours
C8.9 (normal) flare - July 21 at 5:21 AM
Solar activity index
Value as of the end of the day on July 21, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 20, 2004 to July 21, 2004
Time zone — UTC+00
List of solar flares for July 21, 2004
The total number of solar flares of class C and higher — 1 flare
C class — 1 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C8.9 | 05:05 | 05:21 | 05:33 | 652 |