Can we put something in the oceans to slow down tsunamis?

It is far cheaper in lives, material, and money to completely rebuild our shorelines after every tsunami than to build tsunami blockers in the oceans. Note: The Japanese build sea walls. We will not build them here except maybe to protect major cities. We enjoy our seaside homes and beaches too much. read more

Tsunamis, however, involve the movement of truly huge amounts of water amounting to the entire"column" of water from the ocean floor to the surface. This is another way to see why the above explanation increases tsunami height. read more