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Homework assignment asks the students to analyze data from a refraction profile across California. The data is presented in a table together with the abstract and map figure scanned from a 1970s article in which the data was published and analyzed. The assignment requires the student to plot the data, determine line-fits to the three arrivals, identify the arrivals as the direct, reflected or refracted arrival and then to determine the layer velocities. They are asked to sketch a cross section of the profile with the layer properties and to illustrate representative travel time paths. In addition, they are asked to consider the velocities and layer thickness and determine what boundary in the continental crust the refracted waves come from. Finally they are asked to compare their results with the results presented in the abstract for the journal article and discuss any differences/similarities.
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