Seismic wave propagation in complex crust-upper mantle media using 2-D finite-difference synthetics
نویسندگان
چکیده
منابع مشابه
Wave propagation in the heterogeneous lower crust – Finite Difference calculations
Wave propagation in heterogeneous media is not only characterized by reflection, transmission and conversion of seismic energy but also by effects such as scattering and tunneling and can be observed on many scales. We investigate elastic wave propagation in the lower crust of the earth. It is remarkable that distance and time scales in a deep crustal reflection problem can be easily transforme...
متن کاملCompact finite difference modeling of 2-D acoustic wave propagation
We present two fourth-order compact finite difference (CFD) discretizations of the velocity-pressure formulation of the acoustic wave equation in 2-D rectangular grids. The first method uses standard implicit CFD on nodal meshes and requires solving tridiagonal linear systems along each grid line, while the second scheme employs a novel set of mimetic CFD operators for explicit differentiation ...
متن کاملSeismic Wave Propagation in Media with Complex Geometries, Simulation of
Glossary Numerical methods Processes in nature are often described by partial differential equations. Finding solutions to those equations is at the heart of many studies aiming at the explanation of observed data. Simulations of realistic physical processes requires generally the use of numerical methods – a special branch of applied mathematics – that approximate the partial differential equa...
متن کاملCrust and upper mantle P- and S-wave delay times at Eurasian seismic stations
Median crust and upper mantle Pand S-wave delay times, based on residuals for teleseismic Pand S-wave arrival times included in the groomed ISC/NEIC database of Engdahl et al. [Bull. Seism. Soc. Am. 88 (1998) 722] are estimated as functions of time and azimuth for Eurasian seismic stations. The effects of source and lower mantle 3-D structure on the station residuals are corrected by ray tracin...
متن کاملWave propagation across acoustic / Biot’s media: a finite-difference method
Numerical methods are developed to simulate the wave propagation in heterogeneous 2D fluid / poroelastic media. Wave propagation is described by the usual acoustics equations (in the fluid medium) and by the low-frequency Biot’s equations (in the porous medium). Interface conditions are introduced to model various hydraulic contacts between the two media: open pores, sealed pores, and imperfect...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1994
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1994.tb03991.x