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EARTHQUAKES

Earthquake terminology

QuestionAnswer
elastic rebound earth is twisted/bent from friction in a fault, then snaps to release the energy.
focus exact origin of an earthquake, often underground
epicenter location at the surface directly above the focus of an earthquake
body waves type of earhtquake waves that travel through the earth, include P and S waves
surface waves type of earthquake wave that travels along the outside of the earth, includes Love and Rayleigh waves
Love Waves seismic surface wave that exhibit a horizontal motion
Rayleigh Waves seismic surface wave that exhibits an elliptical/rolling motion
shadow zone area inside of the earth where no earthquake waves pass through
seismograph instrument that measures vibrations in the earth
seismogram record of vibrations in the earth
magnitude energy released during an earthquake
intensity amount of shaking during an earthquake
Mercalli Scale measures the intensity and damage caused by an earthquake
Richter Scale number scale for expressing the magnitude of an earthquake
tsunami seismic sea wave
seismic gap theory area along a fault that hasn't experienced an earthquake in a long time, but most likely will in the near future
foreshocks mild tremor preceding a much larger earthquake
aftershocks mild tremor that follows a much larger earthquake
normal fault geologic fault in which the hanging wall has moved downward relative to the footwall
thrust fault geologic fault in which the hanging wall has moved upward relative to the footwall
strike-slip fault geologic fault in which there is horizontal movement but no vertical movement
Created by: jamesweide
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