%0 Journal article
%A Hiemer, Vanessa
%A Thomas, Christine
%T Generation of Reflections and PKP Precursors From a Scattering Layer in D″
%R 10.1029/2021GL096900
%J Geophysical Research Letters
%V 49
%N 4

%I 
%X The D″ region consists of many different structures on many length‐scales and here we test whether an inhomogeneous scattering region could potentially explain two of these seismic observables, namely PKP precursors, which are generated by scattering near the core‐mantle boundary, and reflections of a seismic discontinuity in the lowermost mantle. The focus of this study is on modeling PKP precursors and lower mantle reflections. Testing different heterogeneity models with a range of correlation lengths and velocity perturbations for D″, we find that some of our models can produce both waves. Comparing our synthetic seismograms to real data for precursors in adjacent locations beneath the mid‐Atlantic near South America we find the best fitting model with correlation length of 10 km and velocity perturbation of 5% with a gradual increase of scattering defined by a taper from 200 to 400 km above the core‐mantle boundary.
%U http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/10051
%~  FID GEO-LEO e-docs