- Modified Mercalli Scale
Modified Mercalli Intensity Scale definition and map plotting intensity ratings for the 1989 Loma Prieta earthquake. From the Nevada Seismological Laboratory.
www.seismo.unr.edu/ftp/pub/louie/class/100/mercalli.html
- USGS: Modified Mercalli Intensity Scale
How the Mercalli Scale determines earthquake intensity by observing earthquake effects.
neic.usgs.gov/neis/general/mercalli.html
- Hong Kong Observatory: Modified Mercalli Scale
Includes scale definition and picture description of earthquake effects as measured by Mercalli Scale.
www.hko.gov.hk/gts/equake/mms_e.htm
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