layered structures - travel at diF speeds thrugh diF...

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Solid vs fluid Ductile viscous 4 basic types of seismic waves Compressional or P (for primary) Shear or S (for secondary) Love Rayleigh Seismic waves - propagatong vibrations that carry energy from the source f th directions
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Body waves - travle through the body of earth
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Typical Speeds 330 m/s in air 1450 m/s in water ~ 5000 m/s in granite P n S - Let scientists determine indirectly the internal structure of Earth. Cuz these waves
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Unformatted text preview: travel at diF speeds thrugh diF materials P - material is pushed back and forth S - material moves up and down P --> travels through anytype of material, incl. ²uids, at nearly 2x the spead of S Earth's Crust S - only through solids, as ²uids (liquids and gases) do not support sheer stresses Slower than P, speeds typically 60% of that of P in any given material Avg. geothermal gradient 3.5 dgrees / 100m...
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