Describe the Modified Mercalli Scale Explain Why It Is Useful
The scale was expanded to accommodate 12 degrees of intensity by Adolfo Cancani in 1902. A control chart helps the project manager. Earthquake Science The Modified Mercalli Intensity Scale Mmi The seismic moment defines how much force is needed to generate the recorded waves. . To help distinguish it from magnitude scales the MMI scale uses roman numerals. Giuseppe Mercalli an Italian volcanologist introduced the Mercalli Intensity Scale in 1885. In its range of validity each is equivalent to the Richter magnitude. Mercalli ratings are assigned by Roman numerals. That vibration pushes the adjoining piece of ground and causes it to vibrate and thus the energy travels out from the earthquake. In the United States we use the modified Mercalli scale which was adjusted to account for differences in buildings between Italy and southern California. MMI Value Description of Shaking Severity Summary Damage Descript...