Commonly the Richter scale is utilized to measure the intensity of an earthquake. There are several different ways of computing this depend on a variety of different quantities. We will take a quick look at the formula which uses the energy released during an earthquake.
If E refer for the energy released, measured in joules, at the time of an earthquake then the magnitude of the earthquake is provided by,
M = 2/3 log ( E /Eo)
where E = 104.4 joules.