Week Three Lab Report: Earthquake

990 Words Jun 17th, 2013 4 Pages
Associate Level Material
Appendix D

Week Three Lab Report: Earthquakes

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

Judging from the seismogram
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The earthquake is somewhere on the circle around Berkeley, Ca

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? The earthquake is somewhere on the circle around Salt Lake, UT

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 |

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.
The majority of buildings in Afghanistan fall into the latter category. These buildings are especially dangerous because not only are they vulnerable to collapse, but the construction materials are heavy and cause severe injury or death when falling from modest

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