Solar flares on January 21, 2002
The most powerful solar flare in 24 hours
C3.5 (normal) flare - January 21 at 11:33 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+01 (Monaco)
List of solar flares for January 21, 2002
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.5 | 23:29 | 23:33 | 23:42 | 9791 |
| C2.2 | 22:26 | 22:37 | 22:44 | — |
| C1.7 | 19:15 | 19:19 | 19:21 | 9791 |
| C1.7 | 08:41 | 08:47 | 08:53 | 9789 |
| C1.6 | 06:36 | 06:39 | 06:41 | 9785 |
| C3.4 | 04:22 | 04:29 | 04:38 | 9788 |
| C1.7 | 02:35 | 02:39 | 02:49 | 9788 |
| C2.8 | 00:07 | 00:26 | 00:35 | 9788 |