This map shows the focal mechanisms for a number of earthquakes.  The next page has larger versions of the focal mechanisms.

Pick an example of each type of fault, name the fault type, and calculate the orientation of the fault plane.  List any assumptions you make.

Look at all the focal mechanisms; what type of plate boundary do you think this is, and why do you say that?


Location with plate boundaries.  This is the Scotia Arc in the southernmost Atlantic Ocean.  This was not on the quiz.