LAB

                                                                                Created by Joyce Knox  

http://vcourseware4.calstatela.edu/VirtualEarthquake/VQuakeExecute.html

Where is your earthquake (circle one)?

San Francisco                        Southern California                 Japan              Mexico

Questions:

1. What do we call the place in the earth's crust where an earthquake originates?
2. Another name for shock waves _______________
3. This machine detects earthquakes. ______________
4. What are the 2 main types of earthquake waves? How do they differ?

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5. On the diagram below, label the p wave and the s wave.

6. Fill in the chart with your answers.

7. What two factors affect the speed at which earthquake waves travel?

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8.      Why is the difference in arrival time between S and P-type waves important to seismologists?

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9. Where was your epicenter? __________________________________________

10. Explain why reports from 3 seismic stations are needed to determine an earthquakes epicenter. Why are 2 not enough?

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11. What scale is used to determine the “strength” or magnitude of an earthquake?

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12. What was the magnitude of your quake? ________________________________