Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7566
Authors: | Peter, D.* Komatitsch, D.* Luo, Y.* Martin, R.* Le Goff, N.* Casarotti, E.* Le Loher, P.* Magnoni, F.* Liu, Q.* Blitz, C.* Nissen-Meyer, T.* Basini, P.* Tromp, J.* |
Title: | Forward and adjoint simulations of seismic wave propagation on fully unstructured hexahedral meshes | Journal: | Geophysical Journal International | Series/Report no.: | /186 (2011) | Issue Date: | 2011 | DOI: | 10.1111/j.1365-246X.2011.05044.x | Keywords: | Tomography Interferometry Computational seismology Wave propagation |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous 05. General::05.01. Computational geophysics::05.01.05. Algorithms and implementation |
Abstract: | We present forward and adjoint spectral-element simulations of coupled acoustic and (an)elastic seismic wave propagation on fully unstructured hexahedral meshes. Simulations benefit from recent advances in hexahedral meshing, load balancing and software optimization. Meshing may be accomplished using a mesh generation tool kit such as CUBIT, and load balancing is facilitated by graph partitioning based on the SCOTCH library. Coupling between fluid and solid regions is incorporated in a straightforward fashion using domain decomposition. Topography, bathymetry and Moho undulations may be readily included in the mesh, and physical dispersion and attenuation associated with anelasticity are accounted for using a series of standard linear solids. Finite-frequency Fre ́chet derivatives are calculated using adjoint methods in both fluid and solid domains. The software is benchmarked for a layercake model. We present various examples of fully unstructured meshes, snapshots of wavefields and finite-frequency kernels generated by Version 2.0 ‘Sesame’ of our widely used open source spectral-element package SPECFEM3D. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
Geophysical Journal International Peter.pdf | 1.31 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
184
checked on Feb 10, 2021
Page view(s)
217
checked on Apr 17, 2024
Download(s)
28
checked on Apr 17, 2024