1. Earthquake Machine Lite Michael Hubenthal - IRIS; Larry Braile - Purdue University; John Lahr - USGS; John Taber - IRIS Mechanical Modeling to Increase Student Understanding of Complex Earth Systems

2. Guiding Question(s) What is an earthquake? What is the role of a model in science? How are scientific ideas constantly changing?

3. Have you even been outside at night and felt nervous or frightened? Calvin and Hobbes by Bill Watterson

4. Will the flashlight help us feel better here?

6. Answer the following question on your sticky note… What is an Earthquake? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

7. Calvin and Hobbes by Bill Watterson

8. B C EQ Machine - Lite Top View C Rubber Band Thin Tape Measure Wood Block w/ Sandpaper Tape Measure Sandpaper Wood Block Guide

9. B C EQ Machine - Lite Top View Bulk of the Plate Edge of the Plate Elastic Properties of Earth Materials Plate has Constant Velocity Here of 1cm/year

10. Seismic Moment M o = fault length x fault width x displacement x rigidity Moment Magnitude = M w = log M o /1.5 – 10.7

11. Seismic Moment M o = fault length x fault width x displacement x rigidity Visualizing magnitude with the model B Moment Magnitude = M w = log M o /1.5 – 10.7

13. Distant forces cause a gradual build up of stress in the earth over tens or hundreds or thousands of years, slowly distorting the earth underneath our feet. Eventually, a pre- existing weakness in the earth--called a fault or a fault zone- -can not resist the strain any longer and fails catastrophically. Elastic Rebound Theory