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Bulletin of the Seismological Society of America; December 1988; v. 78; no. 6; p. 2089-2097
© 1988 Seismological Society of America
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Improved transparent boundary formulations for the elastic-wave equation

RICHARD STACEY

CITY UNIVERSITY NORTHAMPTON SQUARE, LONDON, EC1V 0HB, United Kingdom

Abstract

It is shown that the paraxial approximations to the wave equation used by Clayton and Engquist can be improved upon, allowing more accurate finite-difference formulations at internal boundaries and corners, and formulations that are stable over a wider range of the parameters.




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