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Modified Mercalli Intensity (MMI) scale
- The shaking and damage caused by an earthquake is termed the intensity, which is measured qualitatively, using the Modified Mercalli Intensity (MMI) scale.
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Mar 2, 2024 · The Richter scale or local magnitude (Ml) measures the energy released by an earthquake from its epicenter, the point on the surface that is just above the hypocenter or focus of the movement. It is a logarithmic scale in which each number represents an intensity ten times greater than the previous one. Therefore, the difference between a ...
- Science Journalist
Mar 15, 2024 · The fundamental controls on earthquake shaking (earthquake "intensity') at a given location are the magnitude of the event, and the distance from the epicenter and depth to the hypocenter; Earthquake intensity may vary with geologic factors such as the type of soil or rock, resonance, and topographic effects; Activity Pathway
Mar 15, 2024 · Description. This lecture and associated animations give a compelling introduction to earthquakes--including earthquake waves, magnitude, intensity, USArray seismic data, and resulting hazards such as landslides, liquefaction, and building failure. It also includes some information on seismically resilient building design.
6 days ago · The scale commonly used to measure the magnitude of an earthquake is the Richter Magnitude Scale. Intensity is based on the observed effects of ground shaking on people, buildings, and natural features. It varies from place to place within the disturbed region depending on the location of the observer with respect to the earthquake epicenter.
1 day ago · The focus of the quake on the surface is called the epicenter. We have no knowledge beyond estimates of the magnitude of the San Francisco earthquake in 1906. Today we can reliably measure earthquakes up to 14.0 on the Richter scale. In 2024 we have global networks sensitive to tiny shivers accessible instantly anywhere on Earth.
The intensity of an earthquake is a relative measure of the amount of destruction, caused by the earthquake and can be measured using several scales, the most important of which is the Mercalli scale. If the earthquake is weak, it is usually not felt by humans but is registered by seismic instruments.