---- Compressional structure at reference time
---- compressional velocitychanges through time
---- Rayleigh wave modeling
---- Time-variance of dispersion relation
---- Shear wave structure
---- Shear velocitychanges with time
---- Comparison of compressional and shear wave velocity
(Sensitivity of ground water model)
Photo: Josh Radoff using a sledge hammer to create a seismic impulse. 2500+ signals were used to track the distribution of water in the sand through a tide cycle.
Photo:The seismic energy travelled through the a mix of dry, damp amd saturated sands.
Photo: An array of buried geophones recorded the seismic response.