EOSC 114 EARTHQUAKES multiple choice - University of British Columbia EOSC 114

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1. When earthquake scientists poll residents of a city struck by an earthquake, what are they trying to figure out? Student Response Value Correct Answer Feedback A. Richter magnitude B. inten... sity C. anisotropy D . rupture directionality 0% E. hypocenter depth Score: 0/1 2. Where do most large-magnitude earthquakes occur? Student Response Value Correct Answer Feedback A. in the interior of continental plates B. in the interior of oceanic plates C. along midocean ridges D. near strike slip faults E . where plates converge 100% Score: 1/1 3. Which of the following is not an aspect of earthquake prediction? Student Response Value Correct Answer Feedback A . Why does an earthquake occur? 100% B. Where will an earthquake occur? C. When will an earthquake occur? D. What will the effects of an earthquake be? E. What is the likelihood of a huge earthquake in Cascadia? Score: 1/1 4. In order to estimate an earthquake’s location using seismograms, what do you need to know along with the P-wave and S-wave arrival times? Student Response Value Correct Answer Feedback A. the velocity of the Raleigh wave B. The velocities of the P-wave and S-wave. 100% C. The frequencies of the Pwave and Swave. D. The duration of shaking Student Response Value Correct Answer Feedback during the earthquake. E. the depth of the earthquake Score: 1/1 5. The order in which seismic energy waves arrive at a recording station is _______. Student Response Value Correct Answer Feedback A. surface wave, S wave, P wave B. surface wave, P wave, S wave C. S wave, P wave, surface wave D. S wave, surface wave, P wave E . P wave, S wave, surface wave 100% Score: 1/1 6. How does a layer of soft sediment at the ground surface affect shaking? Student Response Value Correct Answer Feedback A. vertical shaking is increased; no effect on horizontal shaking Student Response Value Correct Answer Feedback B. no measureable effect C. shaking is amplified D . lowfrequency shaking is damped out (canceled) 0% E. body waves are amplified; no effect on surface waves Score: 0/1 7. The figure below shows three seismograms with different ground displacements during the Northridge earthquake. What is the main reason for these differences? Student Response Value Correct Answer Feedback A. different building heights B. different distances from the epicenter C. different rock types 100% D. different depths to the focus E. different Student Response Value Correct Answer Feedback aftershocks Score: 1/1 8. The process of establishing a model of the Earth by "inverting" seismic data involves _______________. Student Response Value Correct Answer Feedback A. calculating the seismic signals by knowing what’s inside the Earth B. finding out where the earthquake occurred using several seismic signals C. determining how rapidly seismic wave energy is dissipated within the Earth D . using large quantities of seismic data to figure out details about Earth’s structure 100% E. using Earth’s known structure to build a graph showing the travel times of a large number of Student Response Value Correct Answer Feedback seismograms Score: 1/1 9. The chart below shows the number of earthquakes in British Columbia in one year. What is the BEST label for the horizontal axis of this chart? Student Response Value Correct Answer Feedback A. Amount of damage in millions of dollars B. Magnitude 100% C. Depth in kilometres D. Percentage of building destroyed E. Aftershock frequency Score: 1/1 10 . Large earthquakes are caused predominantly by _______. Student Response Value Correct Answer Feedback A. fluctuations in sunspot activity B. major landslides and avalanches C. the release of Student Response Value Correct Answer Feedback strain produced by the moon’s tidal forces D. volcanism and the intrusion of magma E . horizontal and vertical movements in the Earth's lithosphere 100% Score: [Show More]

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