EVERYDAY SCIENCE

Detailed explanation-1: -This movement releases energy and generates seismic waves that can be recorded by specialized instruments used by scientists. The point on a fault at which the first movement or break occurs during an earthquake is called the earthquakes hypocenter (focus) (figure 1).

Detailed explanation-2: -The location below the earth’s surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. Sometimes an earthquake has foreshocks.

Detailed explanation-3: -The focus is the place inside Earth’s crust where an earthquake originates. The point on the Earth’s surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves travel outward from that point in all directions.

Detailed explanation-4: -Answer is C. The point where the waves originate is called the focus of the earthquake. The point within the earth along the rupturing geological fault where an earthquake originates is called the focus, or hypocenter. The point on the earth’s surface directly above the focus is called the epicenter.

Detailed explanation-5: -The point where an earthquake originates is called the seismic focus. It is also known as hypocenter.