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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

9.1. Judging from the seismogram in Figure 9.4 of the lab book, which wave appears to be the most damaging? The surface wave looks like it could be the most damaging.

9.3. Determine the distance to an earthquake at a station that receives P and S waves 5.0 minutes apart. Refer to the Figures 9.4 and 9.5, reproduced below. Hint: (a) Place tick marks on a scrap of paper equal to 5.0 on the minutes axis. (b) Fit that to the horizontal separation between P and S curves. (c) Read distance directly across on the distance axis. The distance at 5,800 of an earthquake with a station receives the P and S waves 5.0 minutes apart.

From Geoscience Laboratory, 5th ed. (p. 155), by T. Freeman, 2009, New York, NY: John Wiley & Sons. Reprinted with permission. From Geoscience Laboratory, 5th ed. (p. 155), by T. Freeman, 2009, New York, NY: John Wiley & Sons. Reprinted with permission.

9.4. At this point, from the information in Figure 9.6A, how specific can you be as concerns the location of that earthquake?

Answer: The earthquake is somewhere on the circle around Seattle

9.5. At this point, from the information in Figure…...

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