Solar flares on January 20, 2003
The most powerful solar flare in 24 hours
C8.1 (normal) flare - January 20 at 4:28 PM
Solar activity index
Value as of the end of the day on January 20, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 19, 2003 to January 20, 2003
Time zone — UTC-10 (Honolulu)
List of solar flares for January 20, 2003
The total number of solar flares of class C and higher — 9 flares
C class — 9 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.8 | 23:20 | 23:27 | 23:33 | — |
| C2.9 | 21:57 | 22:22 | 22:43 | — |
| C4.1 | 19:50 | 19:57 | 20:02 | 260 |
| C8.1 | 16:23 | 16:28 | 16:33 | — |
| C2.0 | 15:21 | 15:34 | 15:40 | — |
| C1.5 | 13:53 | 13:58 | 14:01 | — |
| C1.6 | 13:22 | 13:27 | 13:35 | 260 |
| C1.5 | 11:43 | 11:46 | 11:49 | 267 |
| C1.7 | 08:30 | 09:21 | 09:33 | — |