Effects of Induced Stress on Seismic Waves: Validation Based on Ab Initio Calculations

Jeroen Tromp, Michel L. Marcondes, Renata M.M. Wentzcovitch, Jeannot Trampert

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

When a continuum is subjected to an induced stress, the equations that govern seismic wave propagation are modified in two ways. First, the equation of conservation of linear momentum gains terms related to the induced deviatoric stress, and, second, the elastic constitutive relationship acquires terms linear in the induced stress. This continuum mechanics theory makes testable predictions with regard to stress-induced changes in the elastic tensor. Specifically, it predicts that induced compression linearly affects the prestressed moduli with a slope determined by their local adiabatic pressure derivatives and that induced deviatoric stress produces anisotropic compressional and shear wave speeds. In this article we successfully compare such predictions against ab initio mineral physics calculations for NaCl and MgO.

Original languageEnglish (US)
Pages (from-to)729-741
Number of pages13
JournalJournal of Geophysical Research: Solid Earth
Volume124
Issue number1
DOIs
StatePublished - Jan 2019

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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