|
|
Brief Display | Full Display
Bogdan Kustowski, Adam M. Dziewonski, and Goeran Ekstroem
Nonlinear crustal corrections for normal-mode seismograms
Bulletin of the Seismological Society of America (October 2007), 97(5):1756-1762
Abstract: Index Terms/Descriptors: GeoRef, Copyright 2007, American Geological Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
We present an efficient and accurate method for calculating local nonlinear crustal effects on the eigenfrequency of free oscillations of the Earth. We implement the method in the calculation of synthetic normal-mode seismograms and demonstrate that neglecting the nonlinear crustal effects in the tomographic waveform inversion leads to velocity models that appreciably overestimate fast velocity anomalies beneath orogenic belts and cratons at 250-400 km depth.
algorithms; corrections; crust; earthquakes; eigenvalues; geophysical methods; mantle; oscillations; seismic methods; seismograms; tomography