An improved frequency-wavenumber analysis for determination of dispersion curves in passive seismic method  

Authors / CoAuthors

Roy, I.G.

Abstract

Estimating the shear wave velocity structure of the subsurface from ambient vibration recordings in a passive seismic method requires inverse modelling of a dispersion curve. This can be estimated via frequency-wavenumber analysis of time series data obtained from a seismic array. Precise estimation of the frequency and wavenumber of a signal embedded in random noise is essential to generate a high quality dispersion curve. I propose a new method in which a sparse signal is recovered from a limited number of measurements through a blind source separation technique. I then utilise a technique for high resolution estimation of frequency and wavenumber, which are subsequently used in computing a dispersion curve.

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nonGeographicDataset

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65238

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• External PublicationAbstract

Australian and New Zealand Standard Research Classification (ANZSRC)

• Earth Sciences

• Published_Internal

Publication Date

2007-01-01T00:00:00

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Australian Government Security ClassificationSystem    

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Creative Commons Attribution 4.0 International Licence    

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geoscientificInformation

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