Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### 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"