Solar flares on October 20, 2003
The most powerful solar flare in 24 hours
M1.9 (strong) flare - October 20 at 1:22 AM
Solar activity index
Value as of the end of the day on October 20, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from October 19, 2003 to October 20, 2003
Time zone — UTC-06 (Edmonton) — summer time
List of solar flares for October 20, 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 |
|---|---|---|---|---|
| C6.0 | 22:51 | 22:59 | 23:09 | 484 |
| C7.9 | 21:19 | 21:45 | 22:13 | 484 |
| C2.5 | 20:49 | 20:53 | 21:00 | 484 |
| C6.2 | 16:00 | 17:18 | 16:13 | 484 |
| C4.5 | 14:30 | 14:46 | 15:02 | 484 |
| C5.9 | 13:55 | 14:02 | 14:12 | 484 |
| C2.4 | 12:21 | 12:24 | 12:26 | 484 |
| C3.2 | 09:51 | 09:55 | 09:58 | 484 |
| C3.3 | 08:45 | 08:49 | 08:52 | 484 |
| M1.9 | 00:45 | 01:22 | 01:43 | 484 |