Elastic Bottom Propagation Mechanisms Investigated by Parabolic Equation Methods
Abstract
The long-term goal of this project is to develop elastic parabolic equation (PE) methods to study elastic propagation mechanisms and their effects on underwater acoustic environments in the form of scattering at an elastic interface, oceanic T-waves, and Scholte waves. The specific goals of the project are to implement explosive and earthquake type seismic sources in current elastic parabolic equation methods for underwater acoustic environments. These will be used to investigate propagation mechanisms that depend on the elastic properties of the ocean bottom and result in acoustic propagation in the ocean. Two examples of such propagation are oceanic T-waves, which are acoustic waves that result from earthquake or buried explosive sources, and Rayleigh-type waves along the ocean floor, whose existence requires horizontal and vertical displacements present in elastic sediments. The generation, propagation, and potential contribution of these waves to the otherwise quiet acoustic field of the deep ocean all require study, in particular as potential sources of unexplained deep shadow zone arrivals that have been experimentally observed below the ray-theoretic turning point.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2013
- Accession Number
- ADA599284
Entities
People
- Scott D. Frank
Organizations
- Marist University