mercalli scale

noun Geology.

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

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 (def. 4)

1. 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.