Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date (YYYY-MM-DD) | Time (UTC) | Latitude | Longitude | Depth | Magnitude |
| --- | --- | --- | --- | --- | --- |
| 2009-09-29 | 17:48:11 | 15.558° S | 172.073° W | km (mi) | 8.1 (M w ) |
| 2009-09-29 | 18:08:22 | 15.467° S | 172.092° W | km (mi) | 5.6 (M w ) |
| 2009-09-29 | 18:19:36 | 15.952° S | 171.611° W | km (mi) | 5.6 (M w ) |
| 2009-09-29 | 18:21:42 | 16.197° S | 173.069° W | km (mi) | 5.8 (M w ) |
| 2009-09-29 | 23:11:51 | 15.565° S | 173.365° W | km (mi) | 5.5 (M w ) |
| 2009-09-29 | 23:45:03 | 15.840° S | 172.531° W | km (mi) | 5.9 (M w ) |
| 2009-10-01 | 06:13:30 | 15.116° S | 172.935° W | km (mi) | 5.7 (M w ) |
| 2009-10-02 | 01:07:39 | 16.579° S | 173.274° W | km (mi) | 6.1 (M w ) |
| 2009-10-14 | 18:00:22 | 14.968° S | 174.919° W | km (mi) | 6.3 (M w ) |
Question:
What is the depth of the aftershock at 18:00:22?
Answer:
km (mi)