Solar flares on September 21, 2001
The most powerful solar flare in 24 hours
C7.7 (normal) flare - September 21 at 12:32 PM
Solar activity index
Value as of the end of the day on September 21, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 20, 2001 to September 21, 2001
Time zone — UTC+05:30 (Indore)
List of solar flares for September 21, 2001
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 |
|---|---|---|---|---|
| C3.6 | 22:12 | 22:15 | 22:17 | 9632 |
| C7.7 | 12:14 | 12:32 | 12:37 | 9631 |
| C3.1 | 12:06 | 12:10 | 12:12 | 9632 |
| C4.1 | 10:18 | 10:25 | 10:32 | 9620 |
| C2.5 | 06:47 | 06:59 | 07:02 | 9620 |
| C3.8 | 00:18 | 00:21 | 00:24 | 9628 |