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The Modified Mercalli intensity scale is expressed in

  • A.decimal values from 0.0 to 9.9
  • B.letters from A to H
  • C.Roman numerals from I to XII
  • D.Arabic numbers from 1 to 10

Answer: C

Roman numerals are used deliberately to signal that the scale is descriptive and ordinal rather than measured, running from imperceptible at I to total destruction at XII. The convention avoids implying a precision the observations cannot support.

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