modified mercalli index - EAS

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  1. The Modified Mercalli Intensity (MMI) estimates the shaking intensity from an earthquake at a specific location by considering its effects on people, objects, and buildings. At high intensities (above MMI 6), earthquake shaking damages buildings.
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    What is the Modified Mercalli intensity scale of 1931?
    Updated November 04, 2019. The Modified Mercalli Intensity Scale of 1931 is the basis for the U.S. evaluation of seismic intensity. Intensity is different than the magnitude in that it is based on observations of the effects and damage of an earthquake, not on scientific measurements.
    www.thoughtco.com/mercalli-earthquake-intensity-scale-…
    What does Level I-V mean on the Mercalli scale?
    For example a level I-V on the Mercalli scale would represent a small amount of observable damage. At this level doors would rattle, dishes break and weak or poor plaster would crack. As the level rises toward the larger numbers, the amount of damage increases considerably. Intensity X (10) is the highest value on the MMI.
    www.usgs.gov/faqs/what-difference-between-earthquake …
    What does X+ mean on the MMI Scale?
    The categories "catastrophe" and "enormous catastrophe" added by Cancani (XI and XII) are used so infrequently that current USGS practice is to merge them into a single category "Extreme" abbreviated as "X+". The lesser degrees of the MMI scale generally describe the manner in which the earthquake is felt by people.
    en.wikipedia.org/wiki/Modified_Mercalli_Intensity_Scale
  3. https://www.usgs.gov/programs/earthquake-hazards/...

    The Modified Mercalli Intensity Scale. By Earthquake Hazards. The effect of an earthquake on the Earth's surface is called the intensity. The intensity scale consists of a series of certain key responses such as people awakening, movement of furniture, damage to chimneys, and finally …

  4. https://en.wikipedia.org/wiki/Modified_Mercalli_intensity_scale

    The Modified Mercalli intensity scale (MM, MMI, or MCS), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake. It measures the effects of an earthquake at a given location, distinguished from the earthquake's inherent force or strength as measured by seismic magnitude scales (such as the "Mw" magnitude usually reported for an earthquake). While shaking is caus…

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    • The Modified Mercalli (MM) Intensity Scale

      https://earthquakescanada.nrcan.gc.ca/info-gen/scales-echelles/mercalli-en.php
      • Felt indoors by many, outdoors by few. Awakened few, especially light sleepers. Frightened no one, unless apprehensive from previous experience. Vibration like that due to passing of heavy, or heavily loaded trucks. Sensation like heavy body striking building, or falling of heavy objects to inside. Rattling of dishes, windows, doors; glassware and ...
      See more on earthquakescanada.nrcan.gc.ca
      What is modified Mercalli scale?
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    • https://www.mtu.edu/geo/community/seismology/learn/...

      Modified Mercalli Intensity Scale | UPSeis | Michigan Tech Engineering Geological and Mining Engineering and Sciences UPSeis How Do We Measure Earthquake Magnitude? Modified

    • https://www.thoughtco.com/mercalli-earthquake-intensity-scale-1441136
      • Occupation: Geology Expert
      • Estimated Reading Time: 4 mins
        1. Not felt except by a very few under especially favorable circumstances.
        2. Felt only by a few persons at rest, especially on upper floors of buildings. …
        3. Felt quite noticeably indoors, especially on upper floors of buildings, but …
        4. During the day felt indoors by many, outdoors by few. At night some …
        5. Felt by nearly everyone; many awakened. Some dishes, windows, etc., …
        6. Felt by all; many frightened and run outdoors. Some heavy furniture moved; a …
        7. Everybody runs outdoors. Damage negligible in buildings of good design and …
        8. Damage slight in specially designed structures; considerable in ordinary …
        9. Damage considerable in specially designed structures; well-designed frame …
        10. Some well-built wooden structures destroyed; most masonry and frame …
    • https://www.usgs.gov/media/images/modified...

      The Modified Mercalli Intensity value assigned to a specific site after an earthquake is a more meaningful measure of severity to many people than is magnitude, because intensity …

    • https://www.usgs.gov/media/images/modified...

      Modified Mercalli Intensity Scale | U.S. Geological Survey Breadcrumb Images Charts or Graphs Modified Mercalli Intensity Scale By Earthquake Hazards Original Thumbnail Medium Detailed Description Abbreviated description of …

    • https://abag.ca.gov/sites/default/files/making_sense_of_the_modified_mercalli...

      The Modified Mercalli Intensity (MMI) estimates the shaking intensity from an earthquake at a specific location by considering its effects on people, objects, and buildings. At high …

    • https://www.usgs.gov/faqs/what-difference-between...

      What is the Modified Mercalli Intensity Scale? Magnitude scales, like the moment magnitude, measure the size of the earthquake at its source. An earthquake has one magnitude. The …

    • https://www.usgs.gov/publications/modified-mercalli-intensity-scale-1931

      Apr 20, 2016 · Modified Mercalli intensity scale of 1931: Publication Type: Article: Publication Subtype: Journal Article: Series Title: Earthquake Information Bulletin (USGS) Index ID: …

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