Solar flares on May 21, 2003
The most powerful solar flare in 24 hours
C4.9 (normal) flare - May 21 at 11:03 PM
Solar activity index
Value as of the end of the day on May 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from May 20, 2003 to May 21, 2003
Time zone — UTC-08 (Anchorage) — summer time
List of solar flares for May 21, 2003
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 |
|---|---|---|---|---|
| C4.9 | 22:42 | 23:03 | 23:12 | 362 |
| C1.1 | 22:11 | 22:17 | 22:21 | 362 |