Solar flares on January 21, 2002
The most powerful solar flare in 24 hours
C3.5 (normal) flare - January 21 at 3:33 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-07 (Lethbridge)
List of solar flares for January 21, 2002
The total number of solar flares of class C and higher — 6 flares
C class — 6 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.9 | 22:42 | 22:46 | 22:50 | — |
| C1.4 | 19:52 | 19:55 | 19:57 | — |
| C3.5 | 15:29 | 15:33 | 15:42 | 9791 |
| C2.2 | 14:26 | 14:37 | 14:44 | — |
| C1.7 | 11:15 | 11:19 | 11:21 | 9791 |
| C1.7 | 00:41 | 00:47 | 00:53 | 9789 |