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quiz 5

Terms in this set (20)

What is the word for the point underground where the rock first ruptures during an earthquake?
focus
Which one choice best explains where most earthquakes occur?
along plate boundaries
Which type of fault is usually responsible for earthquakes near a transform plate boundary?
strike slip
Where would you expect to find the deepest earthquakes occurring?
in subduction zones
Of these choices, where would you most likely expect to find earthquakes occurring with normal faulting and extension of the lithosphere?
east African rift valley
Which of the following is the best example of intraplate earthquakes?
new Madrid earthquake of 1811-1812
Which one best explains the earthquake cycle?
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Strain builds up along a fault, is released when the fault slips, and then begins to build up again.
What is the theory for how earthquakes work in which rocks are strained and then suddenly break?
elastic rebound
Why do surface waves arrive later than body waves during an earthquake?
surface waves propagate more slowly
Can scientists predict earthquakes?
No. Scientists do not know how, and they do not expect to know how any time in the foreseeable future.
The newest scale used to rank earthquakes based on the total amount of seismic energy they release is called the:

You Answered
energy magnitude scale
Which of the following measurements is used to convey the sizes of earthquakes?
magnitude
What does the moment magnitude scale estimate?
how strong the rocks are that have ruptured
If you wanted to know how much damage was done by an earthquake in the San Francisco area in the 1980s, which would be the best piece of information you could use?
a Modified Mercalli Intensity map
To locate an earthquake on Earth, records from how many seismometers are needed?
three
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