time. imagine a huge wall many, many feet high coming at you with such speed and such force that you cannot out swim this you cannot outrun we ve got to be up hi enough. and prayed doesn t hit you that is your own escape welcome to violent earth i m liev schreiber tsunamis are one of the deadliest forces of nature, are most often triggered by earthquakes below or near the ocean unlike weather phenomenon like tornadoes and hurricanes no one can predict when an earthquake and tsunami might happen. there is no season or specific time of year but when an undersea earthquake strikes and a magnitude of 7.5 or larger a dangerous tsunami might be set in motion and unsuspecting people on shore might have only minutes to get to high ground this let s tsunami is very powerful full set of waves it s caused by this larger disruption under the surface of the ocean that moves the water for many hours all across the ocean basin the amount of power and the amount of destruction is really mi