Mercalli scale

[mer-kah-lee, mer-; Italian mer-kahl-lee] /mərˈkɑ li, mɛr-; Italian mɛrˈkɑl li/
noun, Geology
1.
a measure of earthquake intensity with 12 divisions ranging from I (felt by very few) to XII (total destruction).
Origin
1920-25; named after Giuseppe Mercalli (1850-1914), Italian seismologist
British Dictionary definitions for Mercalli scale

Mercalli scale

/mɜːˈkælɪ/
noun
1.
a 12-point scale for expressing the intensity of an earthquake, ranging from 1 (not felt, except by few under favourable circumstances) to 12 (total destruction) Compare Richter scale See also intensity (sense 4)
Word Origin
C20: named after Giuseppe Mercalli (1850–1914), Italian volcanologist and seismologist
Mercalli scale in Science
Mercalli scale
  (mər-kä'lē, měr-)   
A scale of earthquake intensity based on observed effects and ranging from I (detectable only with instruments) to XII (causing almost total destruction). It is named after the Italian seismologist Giuseppe Mercalli.