What Two Scales Are Used to Measure Earthquakes?

Answer

The two main scales used to measure earthquakes are the Richter scales and Mercalli sales. The Richter which was discovered in 1930 by Dr. Charles Richter is a base 10 logarithmic scale. Mercalli on the other hand was invented in 1902 by Giuseppe Mercalli is not considered to be as scientific as the Richter.
Q&A Related to "What Two Scales Are Used to Measure Earthquakes..."
Richter or local magnitude scale. Moment magnitude scale. Bonus: Surface magnitude scale.
http://wiki.answers.com/Q/What_are_two_scales_that...
Scientists evaluate the magnitude of an earthquake using a modified version of the Richter scale, which James Richter invented in 1934, according to UPSeis. This scale is not a physical
http://www.ehow.com/list_6671633_tools-used-measur...
The Richter scale, developed by
http://www.chacha.com/question/what-scale-is-used-...
Richter's scale, of course.
http://answers.yahoo.com/question/index?qid=201206...
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