fault:a huge crack in the crust,at or below the surface,the sides of which may show evidence of motion.
focus:the point where an earthquake starts,where rocks begin to slide past each other.
seismic wave:a vibration that spreads out away from a focus when an earthquake happens.
epicenter:the point on Earth´s surface directly above the focus.
aftershock:the shaking of the crust after the intial shaking of an earthquake.
seismograph:a sensitive device that detects the shakingof the crust.
magnitude:the amount of energy releasedby an earthquake.
focus:the point where an earthquake starts,where rocks begin to slide past each other.
seismic wave:a vibration that spreads out away from a focus when an earthquake happens.
epicenter:the point on Earth´s surface directly above the focus.
aftershock:the shaking of the crust after the intial shaking of an earthquake.
seismograph:a sensitive device that detects the shakingof the crust.
magnitude:the amount of energy releasedby an earthquake.
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