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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 Mercalli intensity scale uses personal reports and observations to measure earthquake intensity but PGA is measured by instruments, such as accelerographs. It can be correlated to macroseismic intensities on the Mercalli scale [ 3 ] but these correlations are associated with large uncertainty.
Only "weak" shaking was felt in parts of Malibu on Saturday, according to the U.S. Geological Survey, as defined by the Modified Mercalli Intensity Scale. "Weak" shaking is generally defined as ...
The S.C. Emergency Management Division said Monday morning’s earthquake was classified as a micro quake, according to the Modified Mercalli Intensity Scale. No major damage or injuries have been ...
The Japan Meteorological Agency said it recorded a maximum seismic intensity of 7 (Shindo 7), the highest level on its seismic intensity scale, [49] the first time that an earthquake of that intensity had been observed in the country since 2018. [50] [51] It corresponded to a maximum Modified Mercalli intensity of X–XI (Extreme). [15]
The maximum intensities are based on the Modified Mercalli intensity scale. Earthquake magnitudes are based on data from the USGS. Compared to other years Number of ...
The earthquake is the most recent large event to occur along that portion of the San Andreas Fault, and is estimated to have had a maximum perceived intensity of IX (Violent) on the Modified Mercalli scale (MMI) near Fort Tejon in the Tehachapi Mountains, and along the San Andreas Fault from Mil Potrero (near Pine Mountain Club) in the San ...