EARTHQUAKES (Chapter 13) - Lecture Outline

Last updated: 03/19/07

Basic considerations

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Earthquakes related to mechanisms of deformation

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Most occur at plate boundaries

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Earthquake predictions are currently not reliable

1. What is an earthquake?

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Definition

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Elastic rebound theory

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focus

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epicenter

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seismic waves

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foreshock

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aftershock

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damage

2. Studying earthquakes

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Types of seismic waves

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P-waves

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S-waves

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Surface waves
 

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Locating earthquakes

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Size of an earthquakd

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Richter scale

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Mercalli scale

3. Earthquakes and patterns of faulting

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First motion studies

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normal faulting

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reverse or thrust faulting

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strike-slip faulting
 

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Distribution of earthquakes

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divergent boundaries

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convergent boundaries

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strike-slip boundaries

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regional fault systems

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other places

4. Earthquake hazards and destructiveness

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Ground vibrations

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Liquefaction

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Tsunamis

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Fire

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Landslide

5. Can earthquakes be predicted?

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Seismic hazard

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Seismic risk

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Reduction of damage

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Prediction and monitoring of hazards