Solar flares on September 20, 2004
The most powerful solar flare in 24 hours
C2.1 (normal) flare - September 20 at 7:21 AM
Solar activity index
Value as of the end of the day on September 20, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 19, 2004 to September 20, 2004
Time zone — UTC+00
List of solar flares for September 20, 2004
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 07:09 | 07:21 | 07:25 | 672 |
| C1.7 | 03:03 | 03:10 | 03:15 | 672 |