Solar flares on January 21, 2003
The most powerful solar flare in 24 hours
M1.9 (strong) flare - January 21 at 3:26 PM
Solar activity index
Value as of the end of the day on January 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 20, 2003 to January 21, 2003
Time zone — UTC+00
List of solar flares for January 21, 2003
The total number of solar flares of class C and higher — 8 flares
C class — 7 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.3 | 21:29 | 21:40 | 21:48 | 260 |
| M1.9 | 14:59 | 15:26 | 15:52 | — |
| C3.0 | 12:46 | 13:10 | 13:31 | 260 |
| C1.8 | 09:20 | 09:27 | 09:33 | — |
| C2.9 | 07:57 | 08:22 | 08:43 | — |
| C4.1 | 05:50 | 05:57 | 06:02 | 260 |
| C8.1 | 02:23 | 02:28 | 02:33 | — |
| C2.0 | 01:21 | 01:34 | 01:40 | — |