text: what are the different types of tsunami?   vintage newsreels show the terrible destruction that a tsunami brought to hilo, hawaii, in 1946.  encyclopædia britannica, inc.  also called  seismic sea wave  or  tidal wave  catastrophic ocean wave, usually caused by a submarine earthquake, by an underwater or coastal landslide, or by the eruption of a volcano. the term tsunami is japanese for “harbour wave.” the term tidal wave is frequently used for such a wave, but it is a misnomer, for the wave has no connection with the tides.    after being generated by an undersea earthquake or landslide, a tsunami may propagate unnoticed …  encyclopædia britannica, inc.  after an earthquake or other generating impulse occurs, a train…