location inside of earth where rocks broke and energy was released; point of origin of an earthquake

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

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Term	Definition
Focus	location inside of earth where rocks broke and energy was released; point of origin of an earthquake
Epicenter	the point on the earth's surface vertically above the focus of an earthquake
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.