Solar flares on June 18, 2004
The most powerful solar flare in 24 hours
C1.8 (normal) flare - June 18 at 12:26 PM
Solar activity index
Value as of the end of the day on June 18, 2004
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from June 17, 2004 to June 18, 2004
Time zone — UTC-04 (Hartford) — summer time
List of solar flares for June 18, 2004
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 |
|---|---|---|---|---|
| C1.3 | 19:48 | 19:56 | 20:03 | 634 |
| C1.8 | 12:19 | 12:26 | 12:30 | 635 |