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Refraction microtremor information


Refraction microtremor (ReMi) is a surface-performed geophysical survey developed by Dr. John Louie (and others) based on previously existing principles of evaluating surface waves and in particular Rayleigh waves. The refraction microtremor technology was developed at the University of Nevada and is owned by the State of Nevada. Optim of Reno, Nevada has the exclusive license to develop the technology, and SeisOpt® ReMi™ has been available commercially from Optim since 2004. Since Rayleigh waves are dispersive, the propagating waves are measured along a linear seismic array and evaluated relative to wave frequency and slowness (or the inverse of the velocity). Due to the dispersive characteristics of higher frequency waves travelling through the more shallow conditions and lower frequency waves passing through deeper materials, a 1-D subsurface profile can be generated based on the velocity with depth.

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Refraction microtremor

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Refraction microtremor (ReMi) is a surface-performed geophysical survey developed by Dr. John Louie (and others) based on previously existing principles...

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Microtremor

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compensated for the site effects. Another technique which known as refraction microtremor is also widely used in earth sciences today. Nakamura, Y., 1989...

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Geotechnical investigation

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surface waves (SASW) Multichannel analysis of surface waves (MASW) Refraction microtremor (ReMi) Other methods: Electromagnetic (radar, resistivity) Optical/acoustic...

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Surface wave inversion

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Direct search algorithm High frequency Rayleigh wave inversion Refraction microtremor method Haskell (1953) first performed the multilayer dispersion...

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Seismic noise

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technique SPAC (spatial auto-correlation) method Correlations methods Refraction microtremor (ReMi) Like earthquakes, ambient vibrations force into vibrations...

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Oscillopsia

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fixation system, the ocular motor noise that comes from microsaccades, microtremors and slow drifts (all necessary for important perceptual functions) are...

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Seismic site effects

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, Vidal S., Bard P.Y. (1998). Relation between curves obtained from microtremor and site effects observed after Caracas 1967 earthquake, 11th European...

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