An example of a deep underwater explosion is the Wahoo test , which was carried out in 1958 as part of Operation Hardtack I . A 9 kt Mk-7 was detonated at a depth of in deep water . There was little evidence of a fireball . The spray dome rose to a height of . Gas from the bubble broke through the spray dome to form jets which shot out in all directions and reached heights of up to . The base surge at its maximum size was in diameter and high
Operation Hardtack I
Operation Hardtack I
Underwater explosion