If we just look into the past most of the death occurred within 1964 Alaskan earthquake, they were caused by seismic sea waves or in other words Tsunami. These waves which are so destructive in other words are also called as "Tidal waves" however it's just a fake name because these waves are not generated by tidal affects of moon. Tsunami start forming in the sea just like the ripple forms in the water when we drop or throw some pebble into it.
Tsunami waves travels with the speed of 500 to 800 kilometers per hour. Although tsunami has that characteristic but still it is not possible to detect it on early stage as in the start the height of the waves is even less then one meter. However when it enters into shallow sea water the waves those are destructive becomes slow down and then it start reaching the height up to 30 meters.
The greatest sign of tsunami is that water is rapid withdrawal of water from the coastal areas. So it's important for the people who are leaving in those areas that after observing that indication they better move to higher ground.
A big wave caused by an earthquake, a powerful volcanic eruption, or an underwater landslide
Tsunami is a word which is derived from the Japanese and is roughly translates as 'Harbour Wave'. It is a very specific phenomenon whereby extremely long wavelengths come ashore. Because the volume of water carried within the wavelengths is so enormous, once the water hits the land, havoc is wreaked. In addition, the wavelengths carry on over a sustained period of time. They can be generated by an exceptionally violent undersea disturbance or activity both in the ocean or near the coast.
Historically tsunami was called tidal wave or seismic waves. The term tidal wave was generally the non-scientific name, but this is inaccurate because tsunami is not tide related, they can be caused by an earthquake or by a meteorite landing etc.
Scientists used to refer to tsunamis as seismic sea waves, but this is also a misnomer because this would mean that a tsunami could only be caused by an earthquake, whereas this is not in fact the case.
A destructive, tidal wave, which wipes out everything in its path
A type of tidal wave usually caused by an underwater earthquake or volcanic eruptions .
A TSUNAMI IS a series of water waves that is caused by the displacement.
Underwater earthquake Is A Tsunami
A tsunami is a natural cataclysm, which results from a very destructive and powerful sea wave, which are caused by natural disasters, like earthquakes and volcanic eruptions
A Tsnuami is a big wave that is caused by under water movement such as underwater earthquakes are volcano eruptions.