Triplicated Pwave measurements for waveform tomography of the mantle transition zone
Stähler, S. C., K. Sigloch, and T. NissenMeyer (2012),
Triplicated Pwave measurements for waveform tomography of the mantle transition zone,
Solid Earth, 3(2), 339–354, doi:10.5194/se33392012.
 Abstract
 Triplicated body waves sample the mantle transition zone more extensively than any other wave type, and interact strongly with the discontinuities at 410 km and 660 km. Since the seismograms bear a strong imprint of these geodynamically interesting features, it is highly desirable to invert them for structure of the transition zone. This has rarely been attempted, due to a mismatch between the complex and bandlimited data and the (raytheoretical) modelling methods. Here we present a data processing and modelling strategy to harness such broadband seismograms for finitefrequency tomography. We include triplicated Pwaves (epicentral distance range between 14 and 30°) across their entire broadband frequency range, for both deep and shallow sources. We show that is it possible to predict the complex sequence of arrivals in these seismograms, but only after a careful effort to estimate source time functions and other source parameters from data, variables that strongly influence the waveforms. Modelled and observed waveforms then yield decent crosscorrelation fits, from which we measure finitefrequency traveltime anomalies. We discuss two such data sets, for North America and Europe, and conclude that their signal quality and azimuthal coverage should be adequate for tomographic inversion. In order to compute sensitivity kernels at the pertinent high body wave frequencies, we use fully numerical forward modelling of the seismic wavefield through a spherically symmetric Earth.
 Further information

 BibTeX

@article{id1830,
author = {S. C. St{\"a}hler and K. Sigloch and T. NissenMeyer},
journal = {Solid Earth},
number = {2},
pages = {339{}354},
title = {{Triplicated Pwave measurements for waveform tomography of the mantle transition zone}},
volume = {3},
year = {2012},
url = {http://www.solidearth.net/3/339/2012/},
doi = {10.5194/se33392012},
}
 EndNote

%0 Journal Article
%A Stähler, S. C.
%A Sigloch, K.
%A NissenMeyer, T.
%D 2012
%N 2
%V 3
%J Solid Earth
%P 339–354
%T Triplicated Pwave measurements for waveform tomography of the mantle transition zone
%U http://www.solidearth.net/3/339/2012/