A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions. ... Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea.

What do you call a large wave at sea?

tsunami. noun. a very large wave or series of waves caused when something such as an earthquake moves a large quantity of water in the sea.

What is the largest kind of wave?

An earthquake followed by a landslide in 1958 in Alaska's Lituya Bay generated a wave 100 feet high, the tallest tsunami ever documented. When the wave ran ashore, it snapped trees 1,700 feet upslope. Five deaths were recorded, but property damage was minimal because there were few cities or towns nearby.