Abstract
AbstractThis study utilizes ultrasonic water tank modelling to examine the complexities which can result when seismic energy is diffracted by even a simple 3D interface structure. Ultrasonic laboratory modelling is carried out in our in‐house water tank, using an aluminum block to simulate very simple ocean‐bottom topography. The topography consists of parallel depressions which simulate valleys running parallel to a mid‐ocean spreading ridge. This study shows that the phase and amplitude of primary ocean‐bottom reflections can vary strongly with the azimuth of propagation. The trailing energy coda also varies dramatically as a function of propagation direction, showing the importance of developing a seismic model which includes the full 3D azimuthal distribution of interface structure.
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