Solar flares on April 20, 2004
The most powerful solar flare in 24 hours
C2.1 (normal) flare - April 20 at 10:58 PM
Solar activity index
Value as of the end of the day on April 20, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 19, 2004 to April 20, 2004
Time zone — UTC-04 (Moosonee) — summer time
List of solar flares for April 20, 2004
The total number of solar flares of class C and higher — 1 flare
C class — 1 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 22:40 | 22:58 | 23:21 | 596 |