mercalli scale

The Mercalli intensity scale is a scale used for measuring the intensity of an earthquake. The scale quantifies the effects of an earthquake on the Earth's surface, humans, objects of nature, and man-made structures on a scale of 1 through 12, with 1 denoting a weak earthquake and 12 one that causes almost complete destruction.
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Noun
1. a scale of earthquake intensity; an earthquake detected only by seismographs is a I and an earthquake that destroys all buildings is a XII
(hypernym) scale, scale of measurement, graduated table, ordered series