Estimation of crustal Poisson's ratio from broad band teleseismic data

Details Estimation of crustal Poisson's ratio from broad band teleseismic data Estimation of crustal Poisson's ratio from broad band teleseismic data

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..241c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 3, p. 241-244.

Physics

10

Broadband, Earth Crust, Physical Properties, Poisson Ratio, Seismology, Geodynamics, Waveforms

Scientific paper

In this paper we describe a single station technique for measuring crustal Poisson's ratio from the boundary interaction phases in broad band teleseismic waveforms. In principle we can derive an estimate from one seismogram, although in practice using several seismograms helps overcome the low signal to noise ratio of the boundary interaction phases. We apply our method to six North American stations using nine deep-focus earthquakes in various locations. By performing a nonlinear search for the optimum Poisson's ratio and Moho depth, we are able to make a stable estimate of Poisson's ratio in each case. Because of the small number of seismograms needed, this technique is especially well suited for portable teleseismic experiments.

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