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20 terms

Earthquakes and Seismology

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Most major earthquakes occur
in association with zones of subduction
The greatest number of earthquakes occur
from the surface to a depth of 40 miles
The seismogram data that are used to determine the distance from a seismic station to the epicenter of an earthquake are the
differences in the arrival time of the p and s body waves
The focus of an earthquake is
the point where the seismic energy was released
The similarity in the geographic distribution of earthquakes and volcanic activity is
they are both associated with the plate margins
The force that drive the San Andreas Fault are the result of
plate tectonics
Rocks from the surface to a depth of a few hundred miles
The rocks decrease in brittleness and increase in plasticity downward
Most of the damage resulting from an earthquake is due to the
Love Waves
The number of earthquakes annually that occur with a Richter Scale reading 8 or hight
Fewer than 5
The major difference between shear and compression shock waves is that
the direction in which the waves move the material through which they are passing
The seismic wave that is a combination of shear and compression motion is
Rayleigh Wave
The Benioff Zone is a zone of earthquakes associated with
Zone of subduction
The point on Earth's surface where the energy of seismic waves is at a maximum
Epicenter
The Mercalli-Rossi Scale measures
Damage
Every step up the Richter Scale Represents _______ times the amount of earth movement
10
The seawave generated by earthqukes within or marginal to an ocean basin is called
tsunami
The component of a seismograph that remains stationary during the arrival of seismic waves is the
pendulum
The first seismic wave to arrive at a seismic station is the
p body wave
The location of an earthquakes epicenter requires data from a minimum of
3 stations
Segments of a fault that have not experienced recent earthquakes is called a
seismic wave