Solar flares on April 23, 2001
The most powerful solar flare in 24 hours
M4.0 (strong) flare - April 23 at 4:30 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-04 (Raleigh) — 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 |
|---|---|---|---|---|
| C3.4 | 23:46 | 23:57 | 00:22 | 9433 |
| C5.3 | 20:15 | 20:22 | 20:30 | 9433 |
| C3.2 | 19:36 | 19:40 | 19:44 | 9433 |
| M4.0 | 16:15 | 16:30 | 16:43 | 9433 |
| C2.8 | 08:06 | 08:23 | 08:36 | 9431 |
| C9.1 | 06:06 | 06:18 | 06:23 | 9433 |
| C2.2 | 02:16 | 02:52 | 03:41 | — |
| C4.1 | 00:37 | 00:52 | 01:00 | 9433 |