Seismic Wave Velocity Calculator
Seismic Wave Velocity
Calculate P-wave and S-wave velocities through different rock types based on density and elastic moduli for seismic analysis.
Formula
Vp = BaseVp x DepthFactor x SaturationFactor; Vs = BaseVs x DepthFactor; Vp/Vs Ratio = Vp / Vs; Poisson Ratio = (Ratio^2 - 2) / (2 x (Ratio^2 - 1))
Frequently Asked Questions
What are P-waves and S-waves?
P-waves (primary waves) are compressional waves that travel fastest and arrive first. S-waves (secondary waves) are shear waves that are slower but cause more ground shaking. S-waves cannot travel through liquids.
Why does wave velocity increase with depth?
As depth increases, so does pressure, which compresses the rock and increases its elastic moduli. This causes seismic waves to travel faster through deeper rock layers.
What affects seismic wave velocity?
Key factors include rock type, density, porosity, fluid saturation, confining pressure (depth), temperature, and fracturing. Saturated rocks transmit P-waves faster than dry rocks.
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