Mercalli Scale Definition

mər-kälē, mĕr-
A scale of earthquake intensity based on observed effects and ranging from I (detectable only with instruments) to XII (causing almost total destruction).
American Heritage

Origin of Mercalli Scale

  • After Giuseppi Mercalli (1850–1914), Italian seismologist

    From American Heritage Dictionary of the English Language, 5th Edition

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Mercalli scale