forces in earths crust
earthquakes and seismic waves
monitoring earthquake
earthquake safety
all of the above
100
what kind of force stretches rock
What is an earthquake
100
p waves move
p waves move in aback and forth movement
100
pattern of lines
What is seismogram
100
it occurs when a earthquake's violent shaking suddenly turns loose, soft soil into liquid mud
What is liquefaction
100
tension in earths crust pulls rock apart causing
What is normal faults
200
what makes rock take millions of years to change its shape back
What is an 8.5 earthquake
200
the point on the surface directly above the focus
What is epicenter
200
force that opposes the motion of one surface as it moves across another surface
What is friction
200
an earthquake that occurs after a large earthquake in some area
What is aftershock
200
has the same structure as a normal fault, but the blocks move in the opposite directions
What is reverse fault
300
if it squeezes rock until it fold or breaks
What is compression
300
s waves moves
the s wave moves side to side
300
measures titling or raising of the ground
What is Tiltmeters
300
the water displaced by the earthquake may from a large wave
What is tsunami
300
the block of rock that lies above
What is hanging wall
400
stress that pushes a mass of rock in two opposite directions
What is shearing
400
it moves lower than p waves and s waves
What is surface waves
400
it causes the seismograph's drum to vibrate
What is seismic waves
400
designed to reduce the amount of energy that reaches the building during an earthquake.
What is base-isolsated building
400
the rock on either side of the fault slip past each other sideways with little up or down motion
What is strike-slip fault
500
the rock that lies below
What is footwall
500
if a number is geologist based on the earthquake size
What is magnitude
500
what is the order of all the waves
What is p waves s waves seismic waves
500
when a wave height Is low
What is open ocean
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