Solar flares on July 18, 2003
The most powerful solar flare in 24 hours
C4.8 (normal) flare - July 18 at 3:58 PM
Solar activity index
Value as of the end of the day on July 18, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 17, 2003 to July 18, 2003
Time zone — UTC-02:30 (Saint john's) — summer time
List of solar flares for July 18, 2003
The total number of solar flares of class C and higher — 8 flares
C class — 8 | M class — 0 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C1.8 | 23:01 | 23:06 | 23:12 | 412 |
| C1.4 | 20:51 | 20:54 | 20:58 | — |
| C1.8 | 20:03 | 20:13 | 20:17 | 412 |
| C2.4 | 17:13 | 17:24 | 17:33 | 412 |
| C4.8 | 15:53 | 15:58 | 16:05 | 410 |
| C1.3 | 11:05 | 11:20 | 11:24 | 412 |
| C1.2 | 05:05 | 05:12 | 05:18 | 410 |
| C2.0 | 01:34 | 01:49 | 01:56 | 410 |