The focus is the location where an earthquake begins within the crust of the Earth. The epicenter is a location on the surface of the Earth that is immediately above the focus. Seismic waves radiate outward in all directions from the focus when energy is released.
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Answer:
The focus is the location where an earthquake begins within the crust of the Earth. The epicenter is a location on the surface of the Earth that is immediately above the focus. Seismic waves radiate outward in all directions from the focus when energy is released.