STRUCTURE OF EARTH
I. SEISMIC WAVE STUDIES
a. P Wave longitudinal-- velocity depends on density and compressibility
Vp= K+ 4/3
p
b. S-Waves depend on density and rigidity (resistance to shearing or distortion)
Vs=
u= shear modulus-10
10-1012 dynes/cm2 (rigidity)Dyne--Force necessary to give acceleration of 1 cm/sec
2 to 1 gram of massp-density gr/cc
K-Bulk modulus (hydrostatic pressure)
10
10-1011 dynes/ cm2