What is a tsunami? a warm season brought on by earth tilting toward the sun an extended period of time with little to no snow or rainfall a large wave usually caused by an undersea earthquake a cool season brought on by earth tilting away from the sun

 Tsunami is a large wave usually caused by an undersea earthquake.

Explanation

Tsunamis are big waves caused by earthquakes or volcanic eruptions beneath the ocean. go in the depths of the ocean, moving ridge waves don't dramatically increase tall.

 However because the waves travel inland, they build up to higher and higher heights because the depth of the ocean decreases.
The speed of moving ridge waves depends on ocean depth instead of the space from the supply of the wave. moving ridge waves might travel as quick as jet planes over deep waters, solely deceleration down once reaching shallow water.