the mercalli scale is a scale from

The Mercalli scale has been in existence longer dating back to the 19 th century. Mercalli scale definition, a measure of earthquake intensity with 12 divisions ranging from I (felt by very few) to XII (total destruction). The Mercalli intensity scale (or more precisely the Modified Mercalli intensity scale) is a scale to measure the intensity of earthquakes.Unlike with the Richter scale, the Mercalli scale does not take into account energy of an earthquake directly. The intensity scale consists of a series of certain key responses such as people awakening, movement of furniture, damage to chimneys, and finally - total destruction. See more. The Mercalli Scale is a rather arbitrary set of definitions based upon what people in the area feel, and their observations of damage to buildings around them. It was modified again by Harry O. Wood and Frank Neumann in 1931, in which intensity is considered to be more suitably graded.A 12-point abridged form of the modified Mercalli scale is provided below.
In earthquake: Intensity scales …in North America is the Mercalli scale, as modified by Harry O. Rather, they classify earthquakes by the effects they have (and the destruction they cause). The Mercalli Intensity Scale was developed by the Italian volcanologist Giuseppe Mercalli in 1884 and expanded to include 12 degrees of intensity in 1902 by Adolfo Cancani. Ironically, it was Charles Richter who gave the scale its updated form which is used today, presently called the MMI scale, or known as the Modified Mercalli scale.

The Richter And Mercalli Scales. Although numerous intensity scales have been developed over the last several hundred years to evaluate the effects of earthquakes, the one currently used in the United States is the Modified Mercalli (MM) Intensity Scale.
The strength of an earthquake is usually measured on one of two scales, the Modified Mercalli Scale and the Richter Scale. Modified Mercalli intensity VIII is roughly correlated with peak accelerations… Wood and Frank Neumann in 1931. It is known today as the Modified Mercalli Intensity Scale. Its name comes from the modifications made to it in the 1890s by an Italian volcanologist, Giuseppe Mercalli.

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