These collide and separate

An undersea earthquake

These areas are devastated by giant tidal waves

The seismograph, richter scale and the moment magnitude scale are all examples of what

Seismic waves are also known as

The San Andreas Fault is located in

A sudden shaking of the Earth is known as a

A seismologist is someone who studies

The place where an earthquake begins below the surface is called

The place where an earthquake begins on the surface is called

A large crack in the earths crust that marks a play boundary is called a fault

The thin outer layer of the Earth is known as the core