SarahRasmussen EQCases Assignment 5.docx - Earthquake Case Histories Prediction Use Class Notes Power Point Lecture and Chapter 4 P 85-106 and Chapter 5

SarahRasmussen EQCases Assignment 5.docx - Earthquake Case...

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Earthquake Case Histories & Prediction Use Class Notes, Power Point Lecture and Chapter 4 P. 85-106 and Chapter 5 P. 107-140 in the text to answer the following questions: Chapter 4 - start at about page 85 1. A) Ground motion during the Alaska 1964 earthquake lasted__ 4.5 minutes B) What caused the death of most of the 131 lost during that earthquake? 119 people died in tsunamis. 2. A) List the plate tectonic setting that caused the 1985 earthquake that rattled Mexico City. T he Pacific plate being sub ducted under the north American plate . B) How far was Mexico City from the earthquake epicenter? The epicenter of Mexico's lethal September 2017 earthquake was less than 65 miles (105 km) outside the nation's capital. C) List the 4 design flaws in the buildings that failed. Amplitude of shaking increases up the building, Buildings with long axes perpendicular to ground motion suffer more shaking, Buildings with different heights sway at different frequencies and bang into each other, Buildings with different heights tend to break apart 3. A) What are the two lines of evidence for a large earthquake in the Pacific Northwest in about 1700 ? The tsunami records from Japan; tree rings of drowned dead trees.
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B) Could a large earthquake shake the region again? Why or why not. Yes because subduction zones cause major earthquakes and the pacific north west is just in the right spot that it will happen. Scientists know it will happen.
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  • Spring '17
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