Glg 220 Week 2 Earthquakes Lab Report

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Week Two Earthquakes Lab Report

Week Two Earthquakes Lab Report

Answer the lab questions for this week and summarize the lab experience using this form.

Carefully read Ch. 9 of Geoscience Laboratory.

Complete this week’s lab by filling in your responses to the questions from Geoscience Laboratory. Select answers are provided for you in red font to assist you with your lab work. Although you are only required to respond to the questions in this worksheet, you are encouraged to answer others from the text on your own.

Questions and charts are from Geoscience Laboratory, 5th ed. (p. 155–167), by T. Freeman, 2009, New York, NY: John Wiley & Sons. Reprinted with permission.

Lab Questions
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From the figure I know that the earthquake is farther from Berkley, CA than Seattle, WA. I do know that the earthquake must be within the two intersecting circles.

9.6. At this point, from the information in Figure 9.6C, how specific can you now be as concerns the location of that earthquake?
From this figure I know that the earthquake is located at the point where all three circles are intersecting. It looks as if it is on the boarder of Montana and Colorado.

9.10. Using the nomogram, determine the Richter magnitude for the three earthquakes listed (see p. 169 in Geoscience Laboratory).

S arrival minus P arrival Amplitude Magnitude
(A) 8 seconds 20 millimeters 4
(B) 8 seconds 0.2 millimeters 2
(C) 6 seconds 10 millimeters 3.5

9.14. The 2002 Afghanistan earthquake measured 5.9 on the Richter scale and killed 1,800 people. The 2001 western Washington earthquake measured 6.8 on the Richter scale and killed only one person. Can you imagine why the huge difference in the numbers of deaths? Hint: It has to do with construction materials.
In Afghanistan people were trapped in their homes, and objects were not properly tied down. Buildings kill people not earthquakes. 9.17. Where is the location of that June 19 quake (to the nearest tenth of a degree latitude and longitude)? Follow the steps 1 through 4 to complete the table below (refer to and complete Appendix D, reproduced from Geoscience

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