L12_WavesAndRays-page5

L12_WavesAndRays-page5 - P and S-velocities P-velocity +4 3...

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Applied Geophysics – Waves and rays - I P and S-velocities ρ µ κ 3 4 + = P V = S V P-velocity S-velocity change of shape and volume change of shape only For liquids and gases µ = 0, therefore Î V S = 0 and V P is reduced in liquids and gases Î Highly fractured or porous rocks have significantly reduced V P The bulk modulus, κ is always positive, therefore V S < V P always P-waves are the most important for controlled source seismology • They arrive first making them easier to observe
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This note was uploaded on 01/07/2012 for the course PHYSICS 384 taught by Professor Wei during the Spring '09 term at SUNY Stony Brook.

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