Solar flares on October 20, 2003
The most powerful solar flare in 24 hours
M1.9 (strong) flare - October 20 at 3:22 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-04 (Granby) — 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 |
|---|---|---|---|---|
| C7.9 | 23:19 | 23:45 | 00:13 | 484 |
| C2.5 | 22:49 | 22:53 | 23:00 | 484 |
| C6.2 | 18:00 | 19:18 | 18:13 | 484 |
| C4.5 | 16:30 | 16:46 | 17:02 | 484 |
| C5.9 | 15:55 | 16:02 | 16:12 | 484 |
| C2.4 | 14:21 | 14:24 | 14:26 | 484 |
| C3.2 | 11:51 | 11:55 | 11:58 | 484 |
| C3.3 | 10:45 | 10:49 | 10:52 | 484 |
| M1.9 | 02:45 | 03:22 | 03:43 | 484 |
| C1.8 | 01:34 | 01:41 | 01:44 | — |