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Mercalli scale vs. Richter scale

Mercalli scale
[mer-kah-lee, mer-, mer-kahl-lee] / mərˈkɑ li, mɛr-, mɛrˈkɑl li /

noun

Geology.

  1. a measure of earthquake intensity with 12 divisions ranging from I (felt by very few) to XII (total destruction).

Richter scale

noun

Richter scales plural

  1. a scale, ranging from 1 to 10, for indicating the intensity of an earthquake.