Solar flares on April 12, 2002
The most powerful solar flare in 24 hours
M4.0 (strong) flare - April 12 at 6:02 PM
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+00
List of solar flares for April 12, 2002
The total number of solar flares of class C and higher — 9 flares
C class — 7 | M class — 2 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M4.0 | 17:31 | 18:02 | 18:17 | 9901 |
| C7.7 | 15:57 | 16:03 | 16:12 | 9907 |
| M1.4 | 13:05 | 13:10 | 13:14 | — |
| C3.0 | 08:39 | 08:42 | 08:44 | 9906 |
| C3.4 | 04:48 | 05:12 | 05:19 | 9899 |
| C5.0 | 03:04 | 03:09 | 03:14 | 9907 |
| C1.9 | 02:50 | 02:53 | 02:56 | — |
| C1.8 | 01:42 | 01:46 | 01:53 | 9906 |
| C1.5 | 01:17 | 01:20 | 01:23 | — |