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59 Cards in this Set

  • Front
  • Back
exact location of an earthquake
FOCUS
location of the focus
BELOW EARTH'S SURFACE
location on the surface directly above origin of the earthquake
EPICENTER
origin of the earthquake
FOCUS
earthquake waves
SEISMIC WAVES
a shift in rocks deep below the surface
EARTHQUAKE
why earthquakes occur
SHIFT IN LITHOSPHERIC PLATES DUE TO CONVECTION
the instrument used to measure earthquake waves
SEISMOMETER
the record of earthquake waves
SEISMOGRAM or SEISMOGRAPH
three types of seismic waves
S,P,L
a line along earthquakes occur
FAULT or FAULT PLANE
a crack in the Earth's crust
FRACTURE
refers to the amount of energy
MAGNITUDE
scale of earthquake magnitude
RICHTER SCALE
refers to the effect of the energy released
INTENSITY
scale of earthquake intensity
MERCALLI SCALE
"P" waves
PRIMARY
first waves to arrive
P or PRIMARY
small waves
P or PRIMARY
longitudinal waves
P or PRIMARY
"S" waves
SECONDARY
second waves to arrive
S or SECONDARY
larger waves
S and L
transverse waves
S and L
waves that travel only through solid layers of Earth
S or SECONDARY
waves that can travel through solid or molten layers of Earth
P or PRIMARY
waves that only travel across the surface of Earth
L or LOVE-RALEIGH
very damaging waves
L or LOVE-RALEIGH
"L" waves
LOVE-RALEIGH
last waves to arrive
L or LOVE-RALEIGH
the process of using seismograms from 3 locations to determine epicenter location
TRIANGULATION
the amount of force applied
STRESS
the response to stress
STRAIN
rocks that bend under stress
DUCTILE
rocks that crack under stress
BRITTLE
the change occurring in rocks due to stress
DEFORMATION
the ability to bend or stretch without permanent change
ELASTIC
when stresses push together
COMPRESSION
when stresses pull apart
TENSION
when stresses pull opposite corners in opposite directions
SHEARING
fault related to shearing stress
LATERAL or STRIKE-SLIP
fault related to transform plate boundary
LATERAL or STRIKE-SLIP
fault type of the San Andreas
LATERAL or STRIKE-SLIP
fault related to compression stress
REVERSE or THRUST
fault related to convergent plate boundary
REVERSE or THRUST
fault at Northridge
REVERSE or THRUST
fault related to tension stress
NORMAL
fault related to divergent boundary
NORMAL
fault created Basin and Range in Nevada
NORMAL
fault that forms a fault scarp
NORMAL
two of these faults produced fault-block mountains (graben-horst)
NORMAL
produces anticlines and synclines
FOLDING
stress related to folding
COMPRESSION
plate boundary related to folding
CONVERGENT
the "hills" or upward folds
ANTICLINES
the "valleys" or downward folds
SYNCLINES
fault that may result in a waterfall
REVERSE or THRUST
results in uplifted mountains
FOLDING
location of most earthquakes
NEAR PLATE BOUNDARIES