Solar flares on September 20, 2011
The most powerful solar flare in 24 hours
C9.5 (normal) flare - September 20 at 8:13 AM
Solar activity index
Value as of the end of the day on September 20, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 19, 2011 to September 20, 2011
Time zone — UTC+03 (Riga)
List of solar flares for September 20, 2011
The total number of solar flares of class C and higher — 10 flares
C class — 10 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.7 | 22:23 | 23:00 | 23:14 | 1295 |
| C1.6 | 20:35 | 20:42 | 20:50 | 1295 |
| C1.5 | 18:45 | 19:33 | 19:57 | — |
| C2.5 | 15:44 | 16:53 | 17:22 | 1301 |
| C1.7 | 15:28 | 15:34 | 15:38 | 1301 |
| C1.7 | 15:15 | 15:19 | 15:26 | — |
| C1.6 | 14:48 | 14:52 | 14:56 | 1296 |
| C2.0 | 09:44 | 09:56 | 10:00 | 1301 |
| C9.5 | 08:00 | 08:13 | 08:17 | 1296 |
| C1.4 | 03:15 | 03:19 | 03:23 | 1296 |