Exam 4: Earthquakes

Most of the structural damage from earthquakes worldwide is caused by

The San Andreas fault near San Francisco

In a fault when the displacement is horizontal then the type of fault is called

The "earthquake cycle" model is based on assumptions that the rate of stress buildup on a given fault segment is constant and that

The time difference between the first arrival of P waves and the first arrival of S waves at a particular seismograph recorder

The United States is the world leader in earthquake preparedness and public education about earthquake hazards.

Scale modeling is a useful tool in designing earthquake-resistant buildings,but its usefulness is limited by the lack of records of actual ground motion during large earthquakes.

Which of the following scales are used for measuring earthquake intensity?

The Northridge and Landers earthquakes may be part of a pattern of increasing seismicity prior to failure along the segment of the San Andreas opposite Los Angeles.

Slow,gradual slip along a fault is termed

Which of the following earthquakes was successfully predicted shortly before it occurred (based on anomalous animal behavior)?

Because there are no active plate boundaries in or near Canada,that country has no detectable earthquake activity.

All of the following have been recognized as earthquake precursors except

The moment magnitude scale may be a better indicator of earthquake severity especially for large earthquakes and those occurring outside of California,where the Richter scale was developed.

An earthquake's epicenter is

P waves can travel through solids only; S waves can travel through both liquids and solids.

How well a concrete structure withstands an earthquake depends on

The seismic-risk map of the United States is based on

Unusual animal behavior precedes some,but not all,earthquakes.

The United States now has an Earthquake Prediction Panel.Since its establishment,