Solar flares on February 4, 2004
The most powerful solar flare in 24 hours
C9.9 (normal) flare - February 4 at 11:18 AM
Solar activity index
Value as of the end of the day on February 4, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from February 3, 2004 to February 4, 2004
Time zone — UTC+00 (London)
List of solar flares for February 4, 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 |
|---|---|---|---|---|
| C9.9 | 11:12 | 11:18 | 11:22 | 547 |