Solar flares on August 21, 2003
The most powerful solar flare in 24 hours
C4.9 (normal) flare - August 21 at 3:22 PM
Solar activity index
Value as of the end of the day on August 21, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from August 20, 2003 to August 21, 2003
Time zone — UTC+00
List of solar flares for August 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 |
|---|---|---|---|---|
| C1.4 | 17:27 | 17:31 | 17:37 | 431 |
| C4.9 | 15:15 | 15:22 | 15:25 | 431 |