Solar flares on September 18, 2011
The most powerful solar flare in 24 hours
C3.8 (normal) flare - September 18 at 7:57 AM
Solar activity index
Value as of the end of the day on September 18, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 17, 2011 to September 18, 2011
Time zone — UTC-03 (Moncton) — summer time
List of solar flares for September 18, 2011
The total number of solar flares of class C and higher — 5 flares
C class — 5 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.6 | 19:23 | 19:27 | 19:29 | 1295 |
| C2.0 | 12:48 | 12:52 | 12:58 | 1295 |
| C3.8 | 06:48 | 07:57 | 08:37 | 1295 |
| C2.9 | 04:32 | 04:35 | 04:37 | 1301 |
| C1.2 | 00:59 | 01:02 | 01:05 | — |