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ABAG uses the modified Mercalli Intensity Scale to depict shaking severity. For additional information on the percentages of residential units that have statistically been made uninhabitable in past California earthquakes by construction type and MMI level, click here.
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www.abag.ca.gov/bayarea/eqmaps/doc/mmi.html
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Mercalli intensity scale - Wikipedia, the free encyclopedia
The Mercalli intensity scale is a scale used for measuring the intensity of an earthquake. The scale quantifies the effects of an earthquake on the Earth's surface, humans, objects of nature, and ma...
en.wikipedia.org/wiki/Mercalli_intensity_scale
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The modified Mercalli intensity scale rates the impact of quakes from I to XII. ... The Modified Mercalli Intensity Scale ... The Modified Mercalli Intensity Scale of 1931 is the basis for the U.S. evaluation of seismic intensity. Unlike earthquake magnitude, which indicates the energy a quake expends,
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geology.about.com/library/bl/blmercalli.htm
geology.about.com/library/bl/blmercalli.htm
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Modified Mercalli Intensity Scale ... Mercalli Intensity Equivalent Richter Magnitude Witness Observations ... I 1.0 to 2.0 Felt by very few people; barely noticeable.
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www.geo.mtu.edu/UPSeis/Mercalli.html
www.geo.mtu.edu/UPSeis/Mercalli.html
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The 1931 Modified Mercalli scale used in the United States assigns a Roman numeral in the range I - XII to each earthquake effect. The methodology is simple.
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www.eas.slu.edu/Earthquake_Center/mercalli.html
www.eas.slu.edu/Earthquake_Center/mercalli.html
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Although numerous intensity scales have been developed over the last several hundred years to evaluate the effects of earthquakes, the one currently used in the United States is the Modified Mercalli (MM) Intensity Scale.
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earthquake.usgs.gov/learn/topics/mercalli.php
earthquake.usgs.gov/learn/topics/mercalli.php
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Modified Mercalli Intensity Scale ... (1931 Abridged and rewritten) ... I. Not felt. Marginal and long-period effects of large earthquakes.
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hvo.wr.usgs.gov/earthquakes/felt/mercalli.html
hvo.wr.usgs.gov/earthquakes/felt/mercalli.html
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What are the Richter and Mercalli Scales and how are earthquakes measured? ... The strength of an earthquake is usually measured on one of two scales, the Modified Mercalli Scale and the Richter Scale. The Mercalli Scale is a rather arbitrary set of definitions based upon what people in the area feel, and their observations...
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www.geography-site.co.uk/pages/physical/earth/richt.htm...
www.geography-site.co.uk/pages/physical/earth/richt.html
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