U.S., New Zealand Tried Creating Tidal Waves During WW2

Apparently, it took a butt-load of explosives and was superseded by the A-bomb

New Zealand and the United States conducted thousands of secret tests attempting to create a "tsunami bomb" during World War Two, a New Zealand author has claimed.

About 3,700 bombs were exploded off Auckland's Whangaparaoa Peninsula and New Caledonia in the operation, dubbed "Project Seal".

The operation found a series of 10 large offshore explosions could generate a 10 metre tsunami, according to research by Kiwi author and film-maker Ray Waru.