Associate Level Material
Earthquake Technology Worksheet
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. 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. 153-168), by T. Freeman, 2009, New York, NY: John Wiley & Sons. Reprinted with permission.
9.1 Judging from the seismogram in Figure 9.4 of the lab book, which wave appears to be the most damaging? Based on the density of the seismogram, I believe the surface wave appears to cause more damage. Based on my studies in a typically earthquake situation the surface wave is the most destructive of all energy transmission. 9.3 Determine the distance to an earthquake at a station that receives P and S waves 5.0 minutes apart. Hint: (a) Place tick marks on a scrap of paper equal to 5.0 on the minute’s axis. (b) Fit that to the horizontal separation between P and S curves. (c) Read distance directly across on the distance axis. Based on the diagram, the distance traveled over a total of five minutes is 1,600 kilometers. 9.5 At this point, from the information in Figure 9.6B, how specific can you now be as concerns the location of that earthquake? The earthquake is located where Seattle and Berkeley stations constructed circles intersect.
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? Based on the seismologist information, the earthquake is located at the Montana Wyoming border where the three circles intersect. 9.10 Using the nomogram, determine the Richter magnitude for the three earthquakes listed (see, p. 169 in the lab book).
S arrival minus p arrival
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