Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 182, Issue 2, Pages 967-976Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-246X.2010.04646.x
Keywords
Time series analysis; Body waves; Coda waves; Cratons; Crustal structure; North America
Categories
Funding
- POLARIS consortium
- US National Science Foundation [EAR-0409509]
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We investigate the applicability of an array-conditioned deconvolution technique, developed for analysing borehole seismic exploration data, to teleseismic receiver functions and data pre-processing steps for scattered wavefield imaging. This multichannel deconvolution technique constructs an approximate inverse filter to the estimated source signature by solving an overdetermined set of deconvolution equations, using an array of receivers detecting a common source. We find that this technique improves the efficiency and automation of receiver function calculation and data pre-processing workflow. We apply this technique to synthetic experiments and to teleseismic data recorded in a dense array in northern Canada. Our results show that this optimal deconvolution automatically determines and subsequently attenuates the noise from data, enhancing P-to-S converted phases in seismograms with various noise levels. In this context, the array-conditioned deconvolution presents a new, effective and automatic means for processing large amounts of array data, as it does not require any ad-hoc regularization; the regularization is achieved naturally by using the noise present in the array itself.
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