22.5 Earthquakes

Front

The huge pieces of the earth's crust are called ____________________________.

Back

plates

Front

The epicenter of an earthquake is ____________________________.

Back

The point on the surface directly above the focus.

Front

Seismology is the branch of science that studies ____________________________.

Back

earthquakes.

Front

This famous transform fault located in the western United States creates significant earthquake activity for California is called ____________________________.

Back

San Andreas.

Front

Smaller earthquakes that occur in the same area after a larger earthquake has occurred are called ____________________________.

Back

aftershock.

Front

The point below the surface where rock begins to break and the first motion occurs is known as ____________________________.

Back

the focus.

Front

The scale used to measure the magnitude of an earthquake is called ____________________________.

Back

the Richter scale.

Front

The shaking of the ground caused by seismic waves is known as ____________________________.

Back

ground shaking.

Front

The phenomenon where saturated soil loses strength and behaves like a liquid during an earthquake is called ____________________________.

Back

liquefaction.

Front

The type of seismic wave that travels the fastest and is the first to be detected is called ____________________________.

Back

P-wave (Primary wave).