Which of the following is the unit of measurement used to describe the severity of an earth quake? velocity, magnitude, volume, density.

Magnitude is the unit of measurement used to describe the severity of an earth quake

Explanation:

Magnitude is the figure that relates to the amplitude of a given earthquake. The activity is most commonly measured with something called as a Richter scale and the most severe ones are over 7 magnitude. There will be thirty times greater energy when the magnitude goes up by one unit.

There are different formulas to determine the magnitude in different types of earthquakes. For eg, if an earthquake that occurred farther than 600km, a formula known as the body wave magnitude can be utilized.