Solar flares on July 18, 2002
The most powerful solar flare in 24 hours
X1.8 (very strong) flare - July 18 at 10:44 AM
Solar activity index
Value as of the end of the day on July 18, 2002
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from July 17, 2002 to July 18, 2002
Time zone — UTC+03 (Bucharest)
List of solar flares for July 18, 2002
The total number of solar flares of class C and higher — 10 flares
C class — 8 | M class — 1 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| C3.3 | 23:16 | 23:27 | 23:35 | 36 |
| C2.1 | 22:52 | 22:57 | 23:06 | — |
| C1.4 | 20:57 | 21:02 | 21:08 | 35 |
| C1.7 | 20:42 | 20:46 | 20:51 | 30 |
| C5.4 | 16:48 | 16:54 | 17:04 | — |
| C2.7 | 14:51 | 14:58 | 15:06 | 37 |
| C1.6 | 11:15 | 11:35 | 11:40 | 30 |
| X1.8 | 10:24 | 10:44 | 10:49 | 30 |
| C1.7 | 09:49 | 09:53 | 09:57 | 30 |
| M2.2 | 06:22 | 06:37 | 06:40 | 30 |