Earth Science HOMEWORK. Please, do not contact me if you don't have experience with using Seismograms to Locate an Earthquake
racpepChapter 7 Investigation Worksheet
Chapter 7 Investigation Worksheet; page 2
Name ____________________________________________ Chapter 7 Investigation Worksheet; page 3
Station |
Distance from earthquake (circle the letter for the best answer) |
Mesaview |
(a) 2-3 km, (b) 3-4 km, (c) 4-5 km, (d) 5-6 km, (e) 6-8 km |
Hillside |
(a) 2-3 km, (b) 3-4 km, (c) 4-5 km, (d) 5-6 km, (e) 6-8 km |
White Sands |
(a) 2-3 km, (b) 3-4 km, (c) 4-5 km, (d) 5-6 km, (e) 6-8 km |
From the general location of the earthquake, which geologic feature is likely to have caused the earthquake? ___________
Table 2. Impact of an Earthquake for Each Town |
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For each of the towns located in this area, infer what hazards possibly accompanied the recent earthquake, considering the topographic and geologic setting of that town. Interpret whether each town has a high, moderate, or low hazard relative to the other towns, and circle your choice in the table below. There is not necessarily one right answer, so explain your reasons in the space provided.
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Name of Town |
Possible Earthquake Hazards (circle all that apply) |
Hazard Relative to the Other Towns (circle one) |
Reasons for High, Moderate, or Low Hazard Assessment |
Sandpoint |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
Hillside |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
Cascade Village |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
Mesaview |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
Name of Town |
Possible Earthquake Hazards (circle all that apply) |
Hazard Relative to the Other Towns (circle one) |
Reasons for High, Moderate, or Low Hazard Assessment |
Ashton |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
Cliffside |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
Riverton |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
|
White Sands |
(a) ground shaking, (b) especially intense ground shaking of areas close to the fault, (c) liquefaction of soils and other weak materials because of shaking, (d) landslides and other slope failures caused by shaking, (e) destruction by a tsunami |
(a) high (b) moderate (c) low |
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Table 3. Locating the Epicenter of the Earthquake (Optional)
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If your instructor asks you to, use the graph of distance versus P-S time interval (on Table 1) to more precisely determine the location of the epicenter of the earthquake. To determine how far the earthquake was from each seismic station, use the P-S time interval for a seismic station and read off the corresponding distance from the P-S time-interval graph. Then, approximately scale off the appropriate distance from the earthquake to the seismic station and sketch part of a circle with this radius around the seismic station. The three circles intersect at the epicenter (the place on the surface directly above the earthquake). The circles may not all intersect at a single point, but may only come close to doing so. The triangles on the figure below represent the location of seismic stations.
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Copyright © McGraw-Hill Education. Permission required for reproduction or display.
Copyright © McGraw-Hill Education. Permission required for reproduction or display.
Copyright © McGraw-Hill Education. Permission required for reproduction or display.