Solar flares on September 18, 2004
The most powerful solar flare in 24 hours
C1.0 (normal) flare - September 18 at 10:09 AM
Solar activity index
Value as of the end of the day on September 18, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from September 17, 2004 to September 18, 2004
Time zone — UTC-06 (Lethbridge) — summer time
List of solar flares for September 18, 2004
The total number of solar flares of class C and higher — 1 flare
C class — 1 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.0 | 10:03 | 10:09 | 10:15 | 673 |