user: Question: What is the depth of the aftershock at 18:00:22?
Columns: ['Date (YYYY-MM-DD)', 'Time (UTC)', 'Latitude', 'Longitude', 'Depth', 'Magnitude']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2009-09-29', '17:48:11', '15.558° S', '172.073° W', 'km (mi)', '8.1 (M w )']
SQL:

assistant: SELECT "Depth" FROM "Table" WHERE "Time (UTC)" = '18:00:22';