Past exam of the year 2 of the earth sciences (geology) course of the University of Oxford / 2023 / Paper 1 / 6 / h / Solution

For transmission into salt, $V_{P3}=4000\mathrm{m}{\mathrm{s}}^{-1}$, soThe transmitted P wave bends away from vertical because it enters a faster medium. The incident angle remains below the $30^{\circ }$ P-wave seismic critical angle at this interface.