Solar flares on May 21, 2004
The most powerful solar flare in 24 hours
C2.0 (normal) flare - May 21 at 7:23 PM
Solar activity index
Value as of the end of the day on May 21, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 20, 2004 to May 21, 2004
Time zone — UTC+03 (Kaluga)
List of solar flares for May 21, 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 |
|---|---|---|---|---|
| C2.0 | 19:16 | 19:23 | 19:28 | 617 |
| C2.0 | 08:46 | 08:51 | 09:04 | 618 |