difference between ritcher and mercalli

Difference between Ritcher and Mercalli
Ritcher scale measures the amount of seismic energy relased by an earthquake, the Richter magnitude of an earthquake is determined from the logarith of the amplitude of waves recorded by seismographs.
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The mercalli intensity scale is a scale used for measuring the intensity of an earthquake. The scale quantifies the effects of an earthquake on the Earth's surface, humans, objects of nature, and man-made structures on a scale of I through XII, with I denoting not felt, and XII one that causes almost complete destruction. The values will differ based on the distance to the earthquake, with the highest intensities being around the epicentral area. Data are gathered from individuals who have experienced the quake, and an intensity value will be given to their location.
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