Solar flares on April 4, 2003
The most powerful solar flare in 24 hours
M1.9 (strong) flare - April 4 at 8:19 PM
Solar activity index
Value as of the end of the day on April 4, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 3, 2003 to April 4, 2003
Time zone — UTC+00
List of solar flares for April 4, 2003
The total number of solar flares of class C and higher — 13 flares
C class — 12 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.9 | 19:05 | 20:19 | 20:40 | 324 |
| C2.0 | 17:28 | 17:36 | 17:45 | 0 |
| C2.2 | 17:07 | 17:12 | 17:16 | 321 |
| C1.6 | 17:00 | 17:04 | 17:06 | 321 |
| C2.7 | 15:46 | 15:55 | 16:02 | 321 |
| C3.4 | 14:10 | 14:16 | 14:31 | 324 |
| C3.1 | 13:28 | 13:41 | 13:47 | 321 |
| C3.9 | 12:08 | 12:17 | 12:22 | 324 |
| C2.0 | 09:46 | 10:01 | 10:19 | 324 |
| C2.8 | 08:35 | 08:40 | 08:44 | 324 |
| C2.4 | 06:50 | 06:55 | 07:03 | 324 |
| C1.9 | 03:42 | 04:34 | 04:36 | 324 |
| C1.2 | 02:36 | 02:39 | 02:44 | 323 |