2015
DOI: 10.1093/gji/ggv213
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Interstation phase speed and amplitude measurements of surface waves with nonlinear waveform fitting: application to USArray

Abstract: S U M M A R YA new method of fully nonlinear waveform fitting to measure interstation phase speeds and amplitude ratios is developed and applied to USArray. The Neighbourhood Algorithm is used as a global optimizer, which efficiently searches for model parameters that fit two observed waveforms on a common great-circle path by modulating the phase and amplitude terms of the fundamental-mode surface waves. We introduce the reliability parameter that represents how well the waveforms at two stations can be fitte… Show more

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Cited by 7 publications
(1 citation statement)
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“…A disadvantage of these methods is that they require calculation of synthetic seismograms, which in turn requires knowledge of the source function. Interstation methods (Dziewonski & Hales 1972;Forsyth & Li 2005;Pedersen 2006;Lin et al 2009;Lin & Ritzwoller 2011;Foster et al 2014a, b;Hamada & Yoshizawa 2015) make use of phase differences between seismograms measured at different stations to estimate phase speeds. Linear-arraybased methods (Nolet 1975(Nolet , 1976Luo et al 2015) involve analysis of multiple stations that lie approximately on a common great circle path; such an array allows one to perform an f−k (frequency and local lateral wavenumber) decomposition of the measured seismograms.…”
mentioning
confidence: 99%
“…A disadvantage of these methods is that they require calculation of synthetic seismograms, which in turn requires knowledge of the source function. Interstation methods (Dziewonski & Hales 1972;Forsyth & Li 2005;Pedersen 2006;Lin et al 2009;Lin & Ritzwoller 2011;Foster et al 2014a, b;Hamada & Yoshizawa 2015) make use of phase differences between seismograms measured at different stations to estimate phase speeds. Linear-arraybased methods (Nolet 1975(Nolet , 1976Luo et al 2015) involve analysis of multiple stations that lie approximately on a common great circle path; such an array allows one to perform an f−k (frequency and local lateral wavenumber) decomposition of the measured seismograms.…”
mentioning
confidence: 99%