How big a tsunami could an atomic bomb planted under the ocean floor create?
You over estimate the power of a nuclear bomb. Both the U.S. and the Soviet Union developed and deployed nuclear tipped torpedos. The U.S. actually did a test in which they detonated a nuclear bomb under water ( http://www.ussjpkennedyjr.org/850asr.html ). The detonation caused a spectacular eruption of water at the surface, but no tsunami. The test bomb had a yield of less than 20 kilotons. However, while hydrogen bomb is much more powerful than this test, it is still not that much more powerful. The fact of the matter is that even our most powerful nukes don’t even release as much energy as a moderate strength earthquake. So, the only way that such a detonation might generate a dangerous wave is if it is detonated fairly close to a coastline. If such a weapon were detonated underwater out in the middle of an ocean, then the energy would be too spread out by the time it got to a coast to pose a dang
