Solar flares on September 4, 2001
The most powerful solar flare in 24 hours
M3.7 (strong) flare - September 4 at 3:59 PM
Solar activity index
Value as of the end of the day on September 4, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 3, 2001 to September 4, 2001
Time zone — UTC-06 (Calgary) — summer time
List of solar flares for September 4, 2001
The total number of solar flares of class C and higher — 9 flares
C class — 6 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.2 | 23:07 | 23:15 | 23:19 | — |
| C9.3 | 20:53 | 20:59 | 21:11 | — |
| C8.9 | 17:50 | 18:16 | 18:39 | — |
| M3.7 | 15:53 | 15:59 | 16:05 | 9601 |
| M1.8 | 14:12 | 14:17 | 14:22 | 9606 |
| M1.0 | 12:53 | 13:25 | 13:37 | — |
| C7.4 | 11:20 | 11:24 | 11:28 | 9606 |
| C9.0 | 09:12 | 09:53 | 10:30 | 9606 |
| C3.92 | 05:48 | 05:56 | 06:15 | 9606 |