Earthquakes (Pre)

Front

What is a Reverse Fault?

Back

A type of fault where the hanging wall moves up relative to the footwall, caused by compressional forces.

Front

What is a Normal Fault?

Back

A type of fault where the hanging wall moves down relative to the footwall, caused by tensional forces.

Front

What is a Strike-Slip Fault?

Back

A type of fault where two blocks of crust slide past each other horizontally.

Front

What is the Epicenter of an earthquake?

Back

The point on the Earth's surface directly above the focus of an earthquake.

Front

What is the Hypocenter of an earthquake?

Back

The point within the Earth where an earthquake originates.

Front

What are Seismic Waves?

Back

Waves of energy produced by an earthquake that travel through the Earth.

Front

What is a P Wave?

Back

The first type of seismic wave to arrive after an earthquake, which compresses and expands the material it travels through.

Front

What is an S Wave?

Back

A type of seismic wave that arrives after the P wave, moving the ground up and down or side to side.

Front

What is a Rayleigh Wave?

Back

A type of surface seismic wave that causes the ground to move in an elliptical motion.

Front

What is a Fault?

Back

A fracture or zone of fractures between two blocks of rock, which can cause earthquakes.