Seismic modelling by methods of the theory of edge waves
Item
Title (Dublin Core)
en-US
Seismic modelling by methods of the theory of edge waves
Description (Dublin Core)
en-US
This paper deals with the computation of wavefields in 3-D inhomogeneous media containing structural elements such as pinch-outs, vertical and oblique contacts, faults, etc. The approach is based on the theory of edge waves. The total wavefield is considered as the superposition of two parts. The first part is described by the ray method. It has discontinuities because of its shadow boundaries. The second part is a superposition of two types of diffracted waves, caused by the edges and vertices of interfaces. This part smooths the above-mentioned discontinuities so that the total wavefield is continuous. Of special importance is the mathematical form of the amplitudes of diffracted waves, described with unified functions of eikonals. In fact, it allows all additional computations to be considered by finding the eikonals of diffracted waves. A modification of the ray method including diffraction by edges and vertices is described. A generalization of the concept of edge waves for caustic situations is given — the method of superposition of edge/tip waves. The result of such a generalization no longer supplements the geometrical seismic description, but completely replaces it by a new description valid for a broader class of wave phenomena (reflection/refraction, diffraction on edges and vertices, formation of caustics, etc.).
ARK: https://n2t.net/ark:/88439/y067930
Permalink: https://geophysicsjournal.com/article/236
ARK: https://n2t.net/ark:/88439/y067930
Permalink: https://geophysicsjournal.com/article/236
Creator (Dublin Core)
Klem-Musatov, K.D.
Aizenberg, A.M.
Subject (Dublin Core)
en-US
Diffraction on edges and vertices
en-US
Amplitudes of diffracted waves
en-US
Superposition of edge/tip waves
en-US
Methods
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1985-08-29
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/236
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 57 No 1 (1985): Journal of Geophysics; 90-105
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/236/196