Solar flares on October 21, 2004
The most powerful solar flare in 24 hours
C7.8 (normal) flare - October 21 at 6:10 AM
Solar activity index
Value as of the end of the day on October 21, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 20, 2004 to October 21, 2004
Time zone — UTC+05:30 (Bilaspur)
List of solar flares for October 21, 2004
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.3 | 20:42 | 20:52 | 20:57 | 682 |
| C1.7 | 19:57 | 20:12 | 20:34 | 682 |
| C5.2 | 12:14 | 12:23 | 12:27 | 687 |
| C2.0 | 10:35 | 10:42 | 10:45 | 687 |
| C4.3 | 07:40 | 07:45 | 07:48 | 687 |
| C7.8 | 05:48 | 06:10 | 06:22 | 687 |