It can be used to calculate the magnitude of Earthquakes that are too large for the Richter scale (any Earthquake with a magnitude over 6.9 is un-suited for measurement using the Richter scale, hence the introduction of the moment magnitude scale for large earthquakes).
For more information about the two scales, please see the related questions.
Richter scale, Modified Mercalli scale, Centigrade scale, and the Moment Magnitude scale
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PAGASA uses the Modified Mercalli Intensity (MMI) scale to measure the intensity of an earthquake in the Philippines. This scale assesses the effects of an earthquake on people, structures, and the environment rather than measuring the actual energy released by the earthquake.
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.
In 1883 a scale that included ten levels of intensity was developed in Europe. The scale was refined in 1902 by Guiseppe Mercalli,an Italian seismologist.-mercallis scale expanded to 12 levels. In 1931 two american scientists, H. O. Wood and Frank Neumann, modified Mercallis version-this version is still used today
modified mercalli scale measure is type of seismograph that they made in the 1989
the modified mercalli scale was VII-VIII
The Modified Mercalli scale or in Europe, the Macroseismic Scale.
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Richter scale, Modified Mercalli scale, Centigrade scale, and the Moment Magnitude scale
The maximum measured intensity of the 2010 Canterbury earthquake in New Zealand was IX (9) on the Modified Mercalli scale.
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About no. 9
Yes, the Modified Mercalli Intensity (MMI) scale is still used today to measure the intensity of earthquakes based on observed effects on people, buildings, and the environment. It provides a valuable complement to seismic magnitude scales in assessing the impact of earthquakes on society.
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. :)