Solar flares on March 18, 2003
The most powerful solar flare in 24 hours
X1.5 (very strong) flare - March 18 at 6:08 AM
Solar activity index
Value as of the end of the day on March 18, 2003
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from March 17, 2003 to March 18, 2003
Time zone — UTC-06 (Fort Smith) — summer time
List of solar flares for March 18, 2003
The total number of solar flares of class C and higher — 15 flares
C class — 12 | M class — 2 | X class — 1
| Class | begin | max | end | region |
|---|---|---|---|---|
| M1.5 | 20:58 | 21:07 | 22:21 | — |
| C3.4 | 20:30 | 20:44 | 20:51 | — |
| C1.7 | 20:10 | 20:15 | 20:23 | 314 |
| C1.5 | 19:35 | 19:50 | 20:06 | 314 |
| C6.2 | 18:13 | 18:18 | 18:23 | — |
| C5.3 | 17:51 | 18:02 | 18:08 | — |
| C5.1 | 17:08 | 17:28 | 17:41 | 314 |
| C2.9 | 16:41 | 16:54 | 17:03 | — |
| C5.9 | 12:49 | 13:03 | 13:15 | — |
| C1.3 | 10:38 | 10:41 | 10:43 | — |
| C2.8 | 10:12 | 10:20 | 10:27 | 314 |
| X1.5 | 05:51 | 06:08 | 06:20 | 314 |
| C2.4 | 04:09 | 04:23 | 04:39 | — |
| C2.1 | 00:36 | 00:45 | 00:58 | 314 |
| M2.5 | 23:51 | 00:00 | 00:02 | 314 |