Comparison With Other Methods
- Rayleigh Wave Dispersion can define the shear-wave structure. Most techniques used to obtained dispersion relations are limited to finding averaged properties between measurement sites. This work extends the dispersion methods to three dimensions.
- Spectral analysis of surface waves (SASW) lacks three-dimensional imaging capability, but can find shear-wave structure as a function of depth.
- Seismic refraction is usually restricted to P-waves and is two-dimensional. Can not detect low-velocity zones at depth.
- Cross hole (with or without tomography) is expensive and provides a two-dimensional image between the wells sampled.
- Well logging methods give direct measurement, but are limited to the vicinity of the well. Drilling can be expensive.