Final answer:
Tsunamis are generated by earthquake waves shaking the ocean floor.
Step-by-step explanation:
Tsunamis are generated by earthquake waves shaking the ocean floor. A tsunami is a series of sea waves caused by an underwater earthquake, landslide, or volcanic eruption. When the ocean is deep, tsunamis may be less than 30 cm high on the ocean's surface and can travel at speeds up to 700 km/hr. In shallow water near the coast, it slows down, causing the sea to rise dramatically.