An earthquakes intensity
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11
11
The maximum measured intensity of the 2010 Canterbury earthquake in New Zealand was IX (9) on the Modified Mercalli scale.
The Rickter (RICK-tur) scale has been popular for decades to measure the intensity of earthquakes, yet it had its issues. These days the Mercalli scale is most often used by geologists and vulcanologists.
Rutlage J Brazee has written: 'Reevaluation of Modified Mercalli Intensity Scale for earthquakes using distance as determinant' -- subject(s): United States, Seismometry, Earthquakes
The Richter scale determines earthquake magnitude by measuring how much the ground moves, and the Modified Mercalli Intensity Scale determines earthquake intensity based on damage to buildings and effects on humans.
considerable damage
The Modified Mercalli Intensity scale is used in the US to determine the severity of earthquake effects. Intensity ratings are in Roman numerals, I - meaning no people felt movement, all the way up to XII - where almost everything is destroyed.The amount of structural and geological damage done by an earthquake in a specific location determines an earthquake's intensity on the Mercalli scale. :)
According to the US Geological Survey, the 1906 earthquake reached a maximum intensity of 9 on the Modified Mercalli Intensity scale.
== The mercalli scale also known as the Modified Mercalli Intensity (MMI) scale is a measure of the ground shaking from earthquakes. It is based on how people perceive earthquake shaking and/or the damage caused by an earthquake. Modified Mercalli Intensity is measured at individual locations so one earthquake can have many different measures of MMI. MMI is measured on a scale of 1 to 12 (actually Roman numerals) with 1 corresponding to the slightest shaking and 12 reflecting the strongest earthquake. MMI is not the same as earthquake magnitude which is a single measure of the amount of energy released by an earthquake.