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The Modified Mercalli intensity scale (MM, MMI, or MCS) measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake. Magnitude scales measure the inherent force or strength of an earthquake – an event occurring at greater or lesser depth.
That gave the Mercalli Scale, as well as the European MSK-64 scale that followed, a quantitative element representing the vulnerability of the building's type. [10] Since then, that scale has been called the Modified Mercalli intensity scale (MMS) and the evaluations of the seismic intensities are more reliable.
The first, six-level intensity scale was proposed by Egen in 1828 for an earthquake in Rhineland. [ 4 ] [ 5 ] Robert Mallet coined the term "isoseismal" and produced a map for the 1857 Basilicata earthquake with a three-fold intensity scale and used this and other information to identify the epicentral area (a term he also coined). [ 6 ]
However, this earlier scale did not include the subdivisions of intensity levels 5 and 6 into "upper" and "lower" categories, which had been introduced later in Japan. [52] In South Korea, a seismic intensity scale modeled after Japan’s was used in the past, but since 2001, the country has switched to the Modified Mercalli intensity scale. [53]
The earthquake had a maximum Modified Mercalli intensity of XI (Extreme) evaluated in an area around the epicentre, [2] between the towns of Muzaffarabad and Balakot. It was also assigned XI on the Environmental Seismic Intensity scale. Field surveys of heavy damage to buildings and other structures in Balakot determined that the Modified ...
The second, now known as the Mercalli intensity scale, had ten degrees, and elaborated the descriptions in the Rossi–Forel scale. [4] The Mercalli intensity scale is, in modified form, still used. [5] Unlike the Richter scale, which measures the energy released by an earthquake, the Mercalli intensity scale measures the effects of an
The following is a list of major earthquakes which have occurred in India, including those with epicentres outside India that caused significant damage or casualties in the country. Earthquakes [ edit ]
Modified Mercalli intensity scale; P. PHIVOLCS earthquake intensity scale; R. Rossi–Forel scale This page was last edited on 7 June 2023, at 16:38 (UTC). Text is ...