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Chapter 8: Earthquakes
Terms in this set (15)
Bumps on a fault that keep the rocks on either side locked together.
The region on the fault plane where slip happens is called the:
Which of the following is NOT an advantage of the moment magnitude scale over the Richter scale.
The moment magnitude can be calculated easily using a simple diagram and a ruler.
What ARE advantages of the moment magnitude scale over the Richter scale?
-The magnitude of an earthquake can be calculated even if the seismic waves weren't recorded.
-The moment magnitude scale works for earthquakes far from a seismometer.
-The moment magnitude scale can better represent the energy from earthquakes of long duration.
The Richter scale is an earthquake magnitude scale that uses ___.
The amplitude of seismic waves on a seismograph to approximate the energy released.
Intraplate earthquakes are those which:
Happen in the interiors of tectonic plates, away from margins.
If an earthquake occurred at 700 km depth, that would mean the tectonic setting is:
A subduction zone
Which of the following is evidence that liquefaction has occurred?
Structures appear to have sunk into the ground.
Which statement best describes our ability to predict earthquakes?
We know where earthquakes are likely to occur, but we can't say precisely when.
Seismic tomography can help us create images of Earth's interior because:
Seismic waves travel at different velocities in different materials.
What waves do more damage?
Surface waves typically cause more ground motion than body waves, and therefore do more damage than body waves.
Induced seismicity refers to:
Earthquakes triggered by human activities.
Can the Modified Mercalli Intensity Scale (MMIS) tell you where the epicenter of an earthquake was
Not conclusively. The MMIS has to do with damage to structures, and with peoples' experiences. The location of the highest rating will depend in part on population density and construction practices.
Where do the deepest earthquakes occur?
The S-wave shadow zone provides evidence that the outer core is liquid because:
S-waves cannot travel through the liquid outer core.
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