Solar flares on March 21, 2011
The most powerful solar flare in 24 hours
C4.2 (normal) flare - March 21 at 5:19 PM
Solar activity index
Value as of the end of the day on March 21, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from March 20, 2011 to March 21, 2011
Time zone — UTC+00
List of solar flares for March 21, 2011
The total number of solar flares of class C and higher — 3 flares
C class — 3 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C4.2 | 15:31 | 17:19 | 18:30 | — |
| C1.0 | 11:52 | 11:57 | 12:03 | — |
| C2.6 | 11:45 | 11:47 | 11:50 | — |