Solar flares on April 23, 2001
The most powerful solar flare in 24 hours
M4.0 (strong) flare - April 23 at 5:30 PM
Solar activity index
Value as of the end of the day on April 23, 2001
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 22, 2001 to April 23, 2001
Time zone — UTC-03 (Halifax) — summer time
List of solar flares for April 23, 2001
The total number of solar flares of class C and higher — 8 flares
C class — 7 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C5.3 | 21:15 | 21:22 | 21:30 | 9433 |
| C3.2 | 20:36 | 20:40 | 20:44 | 9433 |
| M4.0 | 17:15 | 17:30 | 17:43 | 9433 |
| C2.8 | 09:06 | 09:23 | 09:36 | 9431 |
| C9.1 | 07:06 | 07:18 | 07:23 | 9433 |
| C2.2 | 03:16 | 03:52 | 04:41 | — |
| C4.1 | 01:37 | 01:52 | 02:00 | 9433 |
| C1.3 | 00:29 | 00:33 | 00:47 | — |