問題一覧
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any sudden movement of the ground caused by the passage of seismic waves
earthquake
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our planet is
dynamic
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the outermost layer of the earth is broken into pieces
plates
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earthquakes are produced by sudden movement along faults and plate boundaries
tectonic
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earthquakes are induced by rising lava or magma beneath active volcano
volcanic earthquakes
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is a measure of earthquake size and remains unchanged with distance
intensity
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describes the degree of shaking caused by an earthquake at a given place
magnitude
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use roman numerals
mercalli scale
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use real numbers
richter scale
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primary effect of earthquake
ground shaking
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secondary effect of earthquake
fire, liquefaction, landslide, tsunami, ground surface rupture
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caused by rapid vibration produced waves that travels through the earth can cause damage, fall or collapse of buildings
ground shaking
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types of fault
normal fault, reverse fault, strike slip fault
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the block above the fault has moved downward relative to the block below
normal fault
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the upper block, above the fault plane, moves up and over the lower block
reverse fault
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are vertical fractures where the blocks of mostly move horizontally
strike slip fault
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2 types of strike slip
right lateral, left lateral
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types of waves
body waves, surface waves
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are seismic waves that travel through the body of the earth
body waves
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are typically generated when the source of the earthquake is close to the earth's surface
surface waves
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types of body waves
s waves, p waves
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also called longitudinal waves or compressional waves due to particle compression
p waves
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type of seismic wave in which rock particles vibrate at right angles
s waves
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types of surface waves
love waves, ray leigh waves
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also a seismic surface wave led to the horizontal shifting of the earth
love waves
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also known as ground roll spread to the ground as ripples
ray leigh waves
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how ground shaking is measured
velocity, duration, acceleration, frequency content shaking
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deformation of the ground that makes the intersection of the fault
ground rupture
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characteristics of ground rupture
length, width
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it depends on the magnitude of earthquake
length
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the deformation along the length of the ground rupture depends on the type of faulting
width
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types of ground rupture
vertical displacement, horizontal displacement
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one side goes up or down
vertical displacement
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lateral movement from side to side one goes to left or right
horizontal displacement