Simultaneous iterative time-domain sparse deconvolution to teleseismic receiver functions |
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Authors: | Christian Escalante Yu J. Gu Mauricio Sacchi |
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Affiliation: | Institute for Geophysical Research, Department of Physics, University of Alberta, Edmonton AB T6G2G7;, Canada. E-mail: |
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Abstract: | In this paper, we present a new approach to estimate high-resolution teleseismic receiver functions using a simultaneous iterative time-domain sparse deconvolution. This technique improves the deconvolution by using reweighting strategies based on a Cauchy criterion. The resulting sparse receiver functions enhance the primary converted phases and its multiples. To test its functionality and reliability, we applied this approach to synthetic experiments and to seismic data recorded at station ABU, in Japan. Our results show Ps conversions at approximately 4.0 s after the primary P onset, which are consistent with other seismological studies in this area. We demonstrate that the sparse deconvolution is a simple, efficient technique in computing receiver functions with significantly greater resolution than conventional approaches. |
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Keywords: | deconvolution inversion sparse regularization teleseismic receiver functions |
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