What was the altitude of the explosion Hardtack Teak?
CREATE TABLE table_148578_1 (altitude__km_ VARCHAR, explosion VARCHAR)
SELECT altitude__km_ FROM table_148578_1 WHERE explosion = "Hardtack Teak"
### Context: CREATE TABLE table_148578_1 (altitude__km_ VARCHAR, explosion VARCHAR) ### Question: What was the altitude of the explosion Hardtack Teak? ### Answer: SELECT altitude__km_ FROM table_148578_1 WHERE explosion = "Hardtack Teak"