Implications of Recent Advances in Anelastic Seismic Ray-tracing Algorithms for Alluvium-basin Response and Seismic-tomography Models of the Crust and Mantle
Description:
New developments in viscoelastic ray theory provide exact numerical models for seismic-engineering models of alluvial basins and anelastic seismic-tomography models of the Earth's crust and mantle, including new insights for anelastic earth-reference models such as PREM. These advances provide exact anelastic ray-tracing algorithms that reveal measurable changes in seismic ray paths, travel times, and amplitudes for Wide-Angle Refracted (WAR) waves. These changes are induced by contrasts in intrinsic anelastic material absorption at seismic boundaries in the Earth that are not predicted by conventional elastic or t* models. These new insights are confirmed by numerical model results that will be presented for anelastic layered models of alluvial basins, crust, and mantle.
Session: Numerical Modeling in Seismology: Theory, Algorithms and Applications - II
Type: Oral
Date: 4/17/2025
Presentation Time: 10:30 AM (local time)
Presenting Author: Roger
Student Presenter: No
Invited Presentation:
Poster Number:
Authors
Roger Borcherdt
Presenting Author
Corresponding Author
rdborcherdt@gmail.com
U.S. Geological Survey
Implications of Recent Advances in Anelastic Seismic Ray-tracing Algorithms for Alluvium-basin Response and Seismic-tomography Models of the Crust and Mantle
Category
Numerical Modeling in Seismology: Theory, Algorithms, and Applications