List of top Geology and Geophysics Questions on Seismic Waves asked in GATE GG

A plane P-wave is incident at an angle of \(60^\circ\) with respect to the normal to a horizontal reflector. If the incident medium is a homogeneous Poisson solid (\(\nu=0.25\)), the angle of the reflected, mode-converted S-wave with respect to the normal (in degrees) is _______ (rounded off to one decimal place).

Two-layer Earth: \(\rho_1=2000\ \text{kg m}^{-3},\ V_1=1800\ \text{m s}^{-1}\) (upper), \(\rho_2=3000\ \text{kg m}^{-3},\ V_2=2100\ \text{m s}^{-1}\) (lower). Compute the normal-incidence P-wave reflection coefficient at the interface. \([\,\text{round off to 3 decimals}\,]\)