earthquakes 9

earthquakes 9 - Earthquake 9 10/11/07 1. (graph) Primary...

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10/11/07 1. (graph) Primary waves (p waves) a. Fastest waves b. Velocity can be found: square root of ((bulk modulus + 4/3shear  modulus)/density) i. Density = mass/unit volume c. If the material is stiff then it will push back faster and stronger so the wave will  travel faster. d. So if the bulk modulus or shear modulus are high then the p wave will be high  too.  2. (graph) Secondary waves (s waves) a. Faster than surface waves, slower than p waves.  b. Looks like a snake. c. Particle motion goes up and down, wave pulse propagates perpendicular to up  and down. d. Velocity can be found: square root of (shear modulus/density) e. Mu = 0 for liquids and gases   shear waves cannot propagate through fluids and  gases f. 2 kinds of shear waves that are polarized into: i. Sv waves (v for vertical) – vertically polarized, vertical loops. (likes  hills/valleys)
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This note was uploaded on 01/23/2009 for the course GEOL 240Lxg taught by Professor 12:30-01:50pm during the Fall '07 term at USC.

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earthquakes 9 - Earthquake 9 10/11/07 1. (graph) Primary...

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