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Virtual Earthquake Lab

Virtual Earthquake Lab


Name _____________________________ Period _____


Objective: The student will learn about the causes of earthquakes, the types of seismic waves and how scientists use seismographic information to determine thelocation and strength of an earthquake.


Materials: Internet access and lab sheet


Procedure and Questions:


  1. Log on to www.geo.mtu.edu/UPSeis/waves.html as a reference to answer the following questions and view demonstrations of different types of waves.


    1. What is seismology?



    1. What are seismic waves?



    1. Name the 2 main types of seismic waves.



    1. Which type of waves travel through the interior of the earth?



    1. Differentiate between P waves and S waves.

P waves

S waves














    1. Click where it says “click here” to see a demonstration of a P wave in action. Describe how the P wave moves?




    1. Click where it says “click here” to see a demonstration of an S wave in action. Describe how the S wave moves.



Below are two seismograms that show you what a P wave looks like compared to an

S wave. Study the two seismograms.



VIRTUAL EARTHQUAKE LAB NAME PERIOD OBJECTIVE THE

VIRTUAL EARTHQUAKE LAB NAME PERIOD OBJECTIVE THE

    1. Explain why the P waves show up first before the S waves.




    1. In the seismograph below, label the P waves and the S waves.

VIRTUAL EARTHQUAKE LAB NAME PERIOD OBJECTIVE THE

    1. Are surface waves of higher or lower frequency than body waves?



    1. Where are surface waves located?



    1. Which type of waves, body or surface cause most of the damage associated with earthquakes?



    1. Click where is says “Click here” to see a demonstration of a Love wave in action. Describe its motion.




    1. Click where it says “Click here” to see a demonstration of a Rayleigh wave in action. Describe its motion.




    1. Which type of wave causes most of the shaking felt from an earthquake?



  1. Now, log on to www.sciencecourseware.com/VirtualEarthquake/ (you must capitalize Virtual and Earthquake)

      • Scroll down to the bottom of the page and click on Execute Virtual Earthquake

      • Read the information carefully and answer the following questions


  1. Why do earthquakes occur?



  1. Where, in general, do most earthquakes occur?



  1. What do you call the point of origin of a seismic wave?



  1. How are seismic waves measured?



  1. How fast do P waves travel?



  1. How fast do S waves travel?





  1. What scale is used to measure the strength of an earthquake?



  1. What do we mean by “magnitude” in reference to earthquakes?



  1. What is the Richter magnitude of an earthquake that we can feel?



  1. What is the Richter magnitude of the strongest earthquakes?



  1. What 2 pieces of information do you need to figure the Richter magnitude of an earthquake?





  1. How much stronger is a magnitude 5 earthquake than a magnitude 3 earthquake?


















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