Largest underwater explosion [Non-nuclear]
Last updated: January 2, 2018 at 20:22 pm
The destruction of Ripple Rock, an underwater mountain and navigation hazard in Discovery Passage (Seymour Narrows), British Columbia. The peak was only 3 m (9 ft) underwater at low tide, which resulted in at least 120 vessels damaged or sunk, and 114 people drowned. 1,270 metric tons of Nitramex 2H explosives were used to blast 635,000 metric tons of rock and water up to 300 m (1,000 ft) into the air on April 5, 1958. The depth at low tide after the explosion was lowered to 14 m (45 ft).
“Ripple Rock is one of the vilest stretches of water in the world.” — Capt. George Vancouver, 1798