Pick up materials for the model Assemble your model Explore the behavior of the model and consider the following How this might this model represent the earthquake process Earthquake Machine ID: 1022207
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1. Defining an Earthquake
2. ProcedurePick up materials for the modelAssemble your modelExplore the behavior of the model and consider the following… “How this might this model represent the earthquake process?”
3. Earthquake Machine
4. BCEQ Machine ComponentsTop ViewCRubber BandThin Tape MeasureWood Block w/ SandpaperTape MeasureSandpaperWood Block Guide
5. BCTop ViewSingle Tectonic PlateLocked Edge of the PlateElastic Properties of Earth MaterialsBulk of Plate Has Constant Velocity of 1cm/yearEarthquake Machine Properties
6. Like and UnlikeAn earthquake is the sudden motion of rocks within the Earth as stored elastic energy is released.
7. Distant forces cause a gradual build up of stress in the earth over tens to thousands of years, slowly distorting the earth Eventually, a pre-existing weakness in the earth can not resist the strain any longer and fails.Elastic Rebound Theory
8. Seismic MomentMo = fault length x fault width xdisplacement xrigidityMoment Magnitude = Mw = log Mo/1.5 – 10.7Relationship of slip to magnitude
9. 9Seismic MomentMo = fault length x fault width x displacement x rigidityVisualizing magnitude with the modelBMoment Magnitude = Mw = log Mo/1.5 – 10.7
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11. Looking ahead….Energy in the model comes from you. Where might this same energy come from in the Earth system? Think - Pair - Share
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