Solar flares on September 30, 2011
The most powerful solar flare in 24 hours
M1.0 (strong) flare - September 30 at 8:06 PM
Solar activity index
Value as of the end of the day on September 30, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 29, 2011 to September 30, 2011
Time zone — UTC+01 (London) — summer time
List of solar flares for September 30, 2011
The total number of solar flares of class C and higher — 5 flares
C class — 4 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.1 | 21:37 | 21:42 | 21:48 | 1302 |
| M1.0 | 19:55 | 20:06 | 20:15 | 1305 |
| C3.4 | 19:42 | 19:47 | 19:53 | 1307 |
| C7.7 | 04:37 | 05:00 | 05:13 | 1305 |
| C1.0 | 03:46 | 03:52 | 03:58 | 1302 |