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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.
In seismology, an isoseismal map is used to show countour lines of equally felt seismic intensity, generally measured on the Modified Mercalli scale. Such maps help to identify earthquake epicenters, particularly where no instrumental records exist, such as for historical earthquakes.
"Moderate" shaking was felt in areas closest to the epicenter, the USGS said, as defined by the Modified Mercalli Intensity Scale. That's strong enough to awaken many people. "Weak" or "light ...
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 ...
"Moderate" and "light" shaking, as defined by the Modified Mercalli Intensity Scale, was felt in parts of Malibu, Thousand Oaks, Agoura Hills, Calabasas and Westlake Village. Moderate shaking is ...
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 area closest to the epicenter felt "very strong" shaking as defined by the Modified Mercalli Intensity Scale; that zone includes a section of the California Aqueduct, which transports water ...