7. The original location of an earthquake is also known as the
A. hotspot.
B. magnitude.
C. horizon.
D. epicenter.
http://earthquake.usgs.gov/learn/kids/eqscience.php
D. Epicenter.
The original location of an earthquake is known as the epicenter. To determine the answer to this multiple-choice question, we need to identify the correct definition for each of the options provided.
A. Hotspot: A hotspot is an area in the Earth's mantle where molten rock, or magma, rises to the surface, creating volcanic activity. This is not the correct answer.
B. Magnitude: Magnitude refers to the amount of energy released by an earthquake. It is measured using a logarithmic scale called the Richter scale. This is not the correct answer.
C. Horizon: In the context of earthquakes, the term horizon does not have a specific meaning. This is not the correct answer.
D. Epicenter: The epicenter of an earthquake is the point on the Earth's surface directly above the location where the earthquake originates. This is the correct answer.
Therefore, the correct answer to the question is D. epicenter.