Solar flares on September 18, 2003
The most powerful solar flare in 24 hours
C2.9 (normal) flare - September 18 at 1:51 PM
Solar activity index
Value as of the end of the day on September 18, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 17, 2003 to September 18, 2003
Time zone — UTC-08 (Anchorage) — summer time
List of solar flares for September 18, 2003
The total number of solar flares of class C and higher — 2 flares
C class — 2 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.9 | 13:45 | 13:51 | 13:57 | — |
| C1.0 | 22:51 | 00:01 | 01:38 | — |