Seismic records were obtained from geophones installed within devices known as ground screws, normally used as bases for small buildings. The data were acquired along with other records at CREWES’ Priddis test site in November/2014. Analysis is basically a comparison between the records and surface geophones at the same recording stations, and some ground screw records show clear advantages in signal to noise ratios. A patent on this type of recording is held by Ross Huntley.
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