Chapter Two

Editor's Note

One of the most awesome spectacles in nature is a large magnitude earthquake.  These destructive events have the power to crumble the ediffices of our civilization and in ancient times to mark the demise of civilizations themselves.  The rumblings of the earth give testimony to the tremendous forces that move continents, alter coastlines and build mountains.  Moreover, earthquakes offer a window into the inner workings of the planet and give insight into its architecture and its dynamic processes.
    The Chapter is presented in three parts.  The first by Shedlock and Pakiser pesents the topic in a broad and general way.  The second reading is a short, general online publication from the U.S.G.S. that describes the differences between magnitude and intesity in some detail.  Part III, by Schulz and Wallace offers a good overview of the San Andreas fault, which has been responsible for two large earthquakes in recent American history.  By bringing the reader from the general to the specific this chapter offers a good lens for investigating the inner workings of earthquakes.


PART I

Earthquakes
United States Geological Survey
online publication
by
Kaye M. Shedlock & Louis C. Pakiser
http://pubs.usgs.gov/gip/earthq1/

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PART II

The Severity of an Earthquake
United States Geological Survey
online publication
http://pubs.usgs.gov/gip/earthq4/severitygip.html

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PART III

The San Andreas Fault
United States Geological Survey
online publication
by
Sandra S. Schulz and Robert E. Wallace
http://pubs.usgs.gov/gip/earthq3/index.html/

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