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The focus of an earthquake is a point: a. on the earth’s surface where the initial release of seismic energy occurs. b. on the earth’s surface where seismic waves are reflected downward. c. within the earth where the initial release of seismic energy occurs. d. within the earth where seismic waves are reflected downward.

Respuesta :

Answer:

a. on the earth’s surface where the initial release of seismic energy occurs.

Explanation:

The correct option is A. The focus of an earthquake is a point on the earth’s surface where the initial release of seismic energy occurs.

What are the causes of earthquakes?

The tectonic plates move slowly over time, but friction causes them to become impermeable at their edges. When friction on the edge is outweighed by stress, an earthquake occurs, releasing energy in waves that move through the earth's crust and produce the shaking we experience.

The focal point 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 directly above the focus. Seismic waves radiate outward in all directions from the focus when energy is released.

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