Solar flares on April 4, 2001
The most powerful solar flare in 24 hours
M3.1 (strong) flare - April 4 at 9:20 PM
Solar activity index
Value as of the end of the day on April 4, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 3, 2001 to April 4, 2001
Time zone — UTC-05 (Springfield) — summer time
List of solar flares for April 4, 2001
The total number of solar flares of class C and higher — 8 flares
C class — 4 | M class — 4 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M3.1 | 21:00 | 21:20 | 22:11 | 9418 |
| C4.4 | 20:29 | 20:34 | 20:43 | — |
| M2.0 | 07:12 | 07:22 | 07:30 | — |
| M1.1 | 06:52 | 06:59 | 07:03 | 9401 |
| M1.6 | 04:41 | 05:27 | 06:11 | 9415 |
| C3.2 | 02:50 | 02:54 | 02:57 | — |
| C8.7 | 01:37 | 01:42 | 01:47 | 9393 |
| C5.6 | 00:05 | 00:33 | 01:17 | 9415 |