The moment magnitude is based on the amplitude and displacement of the earthquake.
An earthquake's magnitude can be determined in a variety of ways. The amplitude of seismic waves measured by seismometers serves as the basis for the majority of scales. Since these scales take into consideration the distance between the earthquake and the seismometer used to record it, the computed magnitude should be roughly the same everywhere it is observed. A different scale is based on the size of the earthquake fault physically and the quantity of slip that took place. Intensity measurements for earthquake shaking are also available. From one earthquake's epicenter to another, its intensity varies substantially.
Because it can be used globally and covers a greater range of earthquake sizes, the moment magnitude scale, abbreviated MW, is recommended nowadays. On the total moment release of the earthquake, the moment magnitude scale is based. Moment is a function of the fault's movement's distance and the force needed to move it. It is produced from earthquake recordings made at various places using modelling. For mild to big earthquakes, Richter magnitudes and moment magnitude estimations are similar.
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