Mercalli v.s Richter Scale

Mercalli Scale	Richter Scale
Qualitative Evidence	Quantitative Evidence
Based on observation and judgment, machines are not used	Uses a seismometer to measure the magnitude of an earthquake
Scale of I-XII in Roman numerals	Scale of 1-10
Less accurate and scientific compared the Richter scale	More accurate since it is logarithmic and open ended. (no max value)
Measures the effects of an earthquake	Measures the magnitude of an earthquake
Invented in 1902	Invented in 1935

Look at this link for further info :)
http://www.geography-site.co.uk/pages/physical/earth/richt.html