Solar flares on January 21, 2002
The most powerful solar flare in 24 hours
C3.5 (normal) flare - January 21 at 10:33 PM
Solar activity index
Value as of the end of the day on January 21, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from January 20, 2002 to January 21, 2002
Time zone — UTC+00
List of solar flares for January 21, 2002
The total number of solar flares of class C and higher — 7 flares
C class — 7 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 22:29 | 22:33 | 22:42 | 9791 |
| C2.2 | 21:26 | 21:37 | 21:44 | — |
| C1.7 | 18:15 | 18:19 | 18:21 | 9791 |
| C1.7 | 07:41 | 07:47 | 07:53 | 9789 |
| C1.6 | 05:36 | 05:39 | 05:41 | 9785 |
| C3.4 | 03:22 | 03:29 | 03:38 | 9788 |
| C1.7 | 01:35 | 01:39 | 01:49 | 9788 |