| Mercalli Scale |
Website Links For Scale |
Information AboutMercalli Scale |
| CATEGORIES ABOUT MERCALLI INTENSITY SCALE | |
| seismic scales | |
| SHOPPER'S DELIGHT | |
|
Evolution of the Mercalli scale The Mercalli scale originated with the widely used simple ten-degree scale by Rossi And Forel , which was revised by Italian volcanologist Giuseppe Mercalli in 1883 and 1902. The terms ''Mercalli intensity scale'' or ''Mercalli scale'' should not be used unless one really means the original ten-degree scale of 1902. The 1902 ten-degree Mercalli scale was subsequently expanded by Cancani in 1904 to twelve degrees. The whole scale was later completely re-written by Sieberg and became known as the Mercalli-Cancani-Sieberg (MCS) scale. The Mercalli-Cancani-Sieberg scale was later modified and published in English by Wood and Neumann in 1931 and is known today as the Modified Mercalli Scale, or the '''MM'''. Modified Mercalli Scale The lower degrees of the MM scale generally deal with the manner in which the earthquake is felt by people. The higher numbers of the scale are based on observed structural damage. The table below is a rough guide to the degrees of the ''Modified Mercalli Scale''. SEE ALSO BIBLIOGRAPHY
|