Solar flares on September 4, 2001
The most powerful solar flare in 24 hours
M3.7 (strong) flare - September 4 at 10:59 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+01 (Dublin) — summer time
List of solar flares for September 4, 2001
The total number of solar flares of class C and higher — 7 flares
C class — 4 | M class — 3 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M3.7 | 22:53 | 22:59 | 23:05 | 9601 |
| M1.8 | 21:12 | 21:17 | 21:22 | 9606 |
| M1.0 | 19:53 | 20:25 | 20:37 | — |
| C7.4 | 18:20 | 18:24 | 18:28 | 9606 |
| C9.0 | 16:12 | 16:53 | 17:30 | 9606 |
| C3.92 | 12:48 | 12:56 | 13:15 | 9606 |
| C5.0 | 05:10 | 05:18 | 05:27 | 9601 |