Solar flares on October 4, 2003
The most powerful solar flare in 24 hours
M1.0 (strong) flare - October 4 at 11:47 AM
Solar activity index
Value as of the end of the day on October 4, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 3, 2003 to October 4, 2003
Time zone — UTC-04 (Augusta) — summer time
List of solar flares for October 4, 2003
The total number of solar flares of class C and higher — 10 flares
C class — 9 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.2 | 22:56 | 23:12 | 23:17 | 473 |
| C1.5 | 21:26 | 21:39 | 21:53 | 471 |
| C1.0 | 20:30 | 20:37 | 20:43 | 471 |
| C1.7 | 15:08 | 15:17 | 15:22 | — |
| C1.3 | 14:22 | 14:26 | 14:29 | 471 |
| C1.6 | 13:53 | 13:57 | 14:03 | 471 |
| M1.0 | 11:42 | 11:47 | 11:49 | 471 |
| C1.7 | 11:15 | 11:23 | 11:30 | 471 |
| C2.5 | 09:09 | 09:17 | 09:41 | — |
| C1.7 | 00:54 | 01:01 | 01:07 | — |