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21 Cards in this Set
- Front
- Back
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What is the name of the seismic phase that travels as a P-wave through the earth's mantle, outer core, and through the mantle once again?
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PKP
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What year did the Loma Prieta Earthquake happen?
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1989
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As the distance to an earthquake increases, __________.
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the elapsed time before the S waves arrive increases
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What type of seismic waves are S waves?
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shear waves
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How do rock particles move during the passage of an S wave through the rock?
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back and forth at right angles to the direction of wave travel
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Which of the following types of seismic waves are the slowest?
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surface waves
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Which of the following types of waves is a compressional sound wave?
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P wave
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Which of the following correctly lists the order in which seismic waves arrive at a seismograph station?
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P waves → S waves → surface waves
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Which of the following types of seismic waves arrive at a seismograph first?
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P waves
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At what type of plate boundary do the deepest earthquakes occur?
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subduction zones
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New lithosphere is created ____________.
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at mid-ocean ridges
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Which of the following mountain ranges formed as a result of ocean-continent convergence?
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the Andes
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Which of the following is a ridge plate boundary?
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the Mid-Atlantic Ridge
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What type of plate boundary is parallel to the direction of plate movement?
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transform plate boundaries
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Which of the following is associated with a ridge (MOR) plate boundary?
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earthquakes, volcanism and rifting
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Earthquakes that originate at depths greater than 100 km are associated with ______ plate boundaries.
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convergent
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If an earthquake occurred in Seattle, Washington, how long would it take for the first seismic waves to arrive at a seismograph station in Miami, Florida, approximately 5000 kilometers away?
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about 8 minutes
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Where is new lithosphere created?
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ridge plate boundaries
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When was the theory of plate tectonics developed?
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1960s
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Which type(s) of plate boundaries indicate(s) the direction of relative plate motions?
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transform fault boundaries
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Shallow earthquakes, less than 20 km deep, are associated with ___________.
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convergent plate boundaries, divergent plate boundaries, and transform plate boundaries
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