Department of Earth Science |Northeastern Illinois University

ESCI 121, Fall 2006

Daily Objectives #20  (November 2, 2006)                                                                        Dr. Sanders

By the end of today’s class, you should be able to do the following:

* Put maps of earthquake foci into a grouping based on patterns of distribution and depth.  For each group, explain what all the maps in that group have in common.

* Explain the relationship between patterns of earthquake distribution and depth with type of plate boundary:

        > divergent

        > transform

        > convergent with subduction (note: using the earthquakes, tell which plate is the subducting one)

        > convergent with no subduction

* Identify areas that have earthquakes, but are not located on boundaries, and explain why earthquakes occur in these places.

* Given a map of an unknown area showing numerous earthquakes, suggest what the plate tectonic setting might be. 

        Some possible examples:

             > A map showing parallel bands of deep, moderate, and shallow focus earthquakes

             > A map showing mostly shallow focus earthquakes, with a few moderate or deep ones, in a line 

             > A map showing shallow focus earthquakes  randomly distributed with no discernible lines

             > A map showing shallow focus earthquakes in well-defined lines--particularly if the area is located in the mid-ocean

* Make a list of all the places on the earth where water can be found.

Department of Earth Science | Northeastern Illinois University

© 2006 Laura L. Sanders.  Last updated November 2, 2006.