Exam 7: Earthquakes and the Earths Structure

A Benioff zone is an earthquake zone at a __________ plate boundary

Only deep earthquakes occur along the Mid-Oceanic Ridge.

No S waves pass through the center of the Earth because:

In liquefaction, the soil loses its shear strength and becomes a solid.

The Mohorovicic discontinuity is the boundary between __________ and __________.

The __________ is located on Earth's surface directly above the initial rupture point of an earthquake.

P waves in the Earth travel more than ten times slower than the speed of sound in air.

__________ is a continuous, slow movement of solid rock along a fault, usually not causing large earthquakes.

The likely source of the Earth's magnetism is:

The San Andreas Fault zone is located at a transform plate boundary.

Primary waves travel more slowly than either type of body wave.

The total amount of energy released during an earthquake, calculated from the amount of movement and the surface area of a fault, is measured by the ___________________ scale.

The initial rupture point of an earthquake is the __________.

It is sometimes possible to predict a large earthquake a few seconds before a building begins to shake and topple.

A tsunami, produced by an undersea earthquake, may travel at 750 kilometers per hour.

During fault creep:

S, or shear, waves:

__________ __________ are body waves that can travel through air, liquid, and solid material.

The Mercalli scale measures:

Geologists learned that the outer core is liquid because __________ do not travel through the outer core.