Solar flares on July 20, 2002
The most powerful solar flare in 24 hours
X3.3 (very strong) flare - July 20 at 11:30 PM
Solar activity index
Value as of the end of the day on July 20, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 19, 2002 to July 20, 2002
Time zone — UTC+02 (Bern) — summer time
List of solar flares for July 20, 2002
The total number of solar flares of class C and higher — 4 flares
C class — 3 | M class — 0 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| X3.3 | 23:04 | 23:30 | 23:54 | — |
| C2.7 | 15:23 | 15:27 | 15:33 | 0 |
| C9.6 | 14:37 | 14:42 | 14:44 | 30 |
| C4.0 | 04:50 | 05:00 | 05:10 | — |