text: Vintage newsreels show the terrible destruction that a tsunami brought to Hilo, Hawaii, in 1946. \nEncyclopædia Britannica, Inc. \nalso 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.\n\n\n\nAfter being generated by an undersea earthquake or landslide, a tsunami may propagate unnoticed … \nEncyclopædia Britannica, Inc. \nAfter an earthquake or other generating impulse occurs, a train…