a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.

the point of origin of an earthquake.

an elastic wave in the earth produced by an earthquake or other means.

he point on the earth's surface vertically above the focus of an earthquake.

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chapter 8 and 10 voc

Term	Definition
earthquake	a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
focus	the point of origin of an earthquake.
seismic waves	an elastic wave in the earth produced by an earthquake or other means.
epicenter	he point on the earth's surface vertically above the focus of an earthquake.
elastic rebound
body waves
p waves
s waves
surface waves
seismograph
richter scale
moment magnitude scale
modified mercalli scale