Intensity 02
Intensity 02 : (a) seismology. (1) A measure of the power or force (magnitude) of the event in relation to the time over which the event occurs and the area over or in which it occurs (Dorland 843). (2) A numerical index denoted by Roman numerals from I to XII describing the physical effects of an earthquake at a specific location on the earth's surface, man, or on structures built by man. These values are determined subjectively by individuals performing postearthquake investigations to determine the nature and spatial extent of the damage distribution. There are no instrumental readings. The most commonly used scales throughout the world are Modified Mercalli Intensity (MMI), developed in the 1930's and named for the Italian author, and the MSK scale, developed in the 1960's and denoted by the first initial of the last name of two scientists of the former Soviet Union and one scientist of the former Czechoslavakia who created the scale. Intensity VI denotes the threshold for potential ground failure such as liquefaction. Intensity VII denotes the threshold for architectural damage. Intensity VIII denotes the threshold for structural damage. Intensity IX denotes intense structural damage. Intensities X to XII denote various levels of destruction up to total destruction. The MMI and MSK scales are essentially equivalent for intensities VII to X. An earthquake has many intensities, but only one magnitude. (3) [seismic intensity] The degree of shaking or of vibrations, signifying the intensity of an earthquake as measured numerically on the Mercalli scale. [PDM, 2000: Disaster Terminology]; (b) parasitology. (1) (Traditional) The mean parasite burden within all the infected members of the host population. Also called mean abundance. (2) (Newer) The mean parasite burden within both infected and uninfected hosts. It is important to indicate which usage is adopted, since they give different statistics, unless the prevalence is 100%. Macroparasites, and infections like malaria, are usually measured in terms of intensity. [Swinton, 1999: A Dictionary of Epidemiology]; (c) exposure assessment. Amount of energy-form agent per area [Zartarian, et al., 1997: Quant. Def. of Exp. & Related Concepts]
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