Solar flares on April 12, 2002
The most powerful solar flare in 24 hours
M4.0 (strong) flare - April 12 at 11:02 AM
Solar activity index
Value as of the end of the day on April 12, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 11, 2002 to April 12, 2002
Time zone — UTC-07 (Phoenix)
List of solar flares for April 12, 2002
The total number of solar flares of class C and higher — 5 flares
C class — 3 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.3 | 22:06 | 22:30 | 22:56 | — |
| M4.0 | 10:31 | 11:02 | 11:17 | 9901 |
| C7.7 | 08:57 | 09:03 | 09:12 | 9907 |
| M1.4 | 06:05 | 06:10 | 06:14 | — |
| C3.0 | 01:39 | 01:42 | 01:44 | 9906 |