Earthquakes and Seismology

20 terms by emarkows

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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

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