SCEC Award Number 22039 View PDF
Proposal Category Individual Proposal (Integration and Theory)
Proposal Title Adjoint Tomography Workflow Applied to California
Investigator(s)
Name Organization
Carl Tape University of Alaska, Fairbanks Julien Thurin University of Alaska, Fairbanks Bryant Chow University of Alaska, Fairbanks
Other Participants
SCEC Priorities 4a, 3b SCEC Groups CXM, Seismology
Report Due Date 03/15/2023 Date Report Submitted 08/07/2024
Project Abstract
 The goal of this project was to build upon our recent results from a two-year SCEC project, by harnessing expert postdoc personnel at UAF to apply the adjoint tomography workflow to southern California. The project involved improving the workflow for adjoint tomography, which enables iterative seismic inversion of 3D Earth models using wavefield simulations. Key developments included 1) the interfacing between IRIS EMC Earth models and Specfem3D, 2) meshing for continental-scale domains having Earth curvature (and topography), 3) quantification of minimum resolvabale periods of synthetic seismogram, 4) event declustering, and 5) enhancements of the SeisFlows/Pyatoa open-source software for iterative inversions.
Intellectual Merit The project contributed to the long-term pursuit of having a functional open-source software package for performing wavefield simulations and adjoint tomography, with specific applications to the SCEC CVMs.
Broader Impacts The project funded one postdoc (Julien Thurin) and engaged several other students and postdocs.
Exemplary Figure Our core developments with software. I cannot recommend any one figure as a highlight.
Linked Publications

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