Solar flares on April 18, 2011
The most powerful solar flare in 24 hours
C1.8 (normal) flare - April 18 at 3:48 AM
Solar activity index
Value as of the end of the day on April 18, 2011
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from April 17, 2011 to April 18, 2011
Time zone — UTC+00
List of solar flares for April 18, 2011
The total number of solar flares of class C and higher — 4 flares
C class — 4 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 19:17 | 19:24 | 19:31 | 1195 |
| C1.5 | 18:55 | 19:02 | 19:08 | 1193 |
| C1.8 | 03:32 | 03:48 | 04:16 | — |
| C1.8 | 02:35 | 02:43 | 02:47 | 1193 |