Unformatted text preview: Elastic moduli: Poisson’s ratio ) ( 2 2 2 2 2 2 S P S P V V V V − − = σ • Tells us about the elastic strength of the material • Important for building foundations etc • Determined from knowledge of V P and V S – need shear sources and horizontal geophones for V S 2. Degree of jointing • Jointing lowers seismic velocity • Degree of jointing can be estimated from velocity for a known rock type...
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- Spring '09
- Geophysics, Earthquake engineering, Applied Geophysics, velocity layer