Hydroacoustic ray theory‐based modeling of T wave propagation in the deep ocean basin offshore eastern Taiwan

摘要: T waves are conventionally defined as seismically generated acoustic energy propagating horizontally over long distances within the minimum sound speed layer in ocean (SOFAR axis minimum). However, have also been observed by ocean-bottom seismometers basins at depths greater than SOFAR minimum. Previously, non-geometrical processes, such local scattering rough seafloor and water-sediment interface coupling, proposed possible mechanisms for deep detection of waves. Here, we employ a new T-wave modeling approach based on hydroacoustic ray theory to demonstrate that seismoacoustic can propagate reach seafloor, previously considered shadow zone propagation. Our simulations explain well observations east Taiwan, shed light mechanism