Shear velocity structure of the Northland Peninsula, New Zealand, inferred from ambient noise correlations
journal contribution
posted on 2021-02-10, 22:09 authored by Y Behr, John TownendJohn Townend, S Bannister, Martha SavageMartha SavageAmbient noise correlation has been successfully applied in several cases to regions with dense seismic networks whose geometries are well suited to tomographic imaging. The utility of ambient noise correlation-based methods of seismic imaging where either network or noise field characteristics are less ideal has yet to be fully demonstrated. In this study, we focus on the Northland Peninsula of New Zealand using data from five seismographs deployed in a linear pattern parallel to the direction from which most of the ambient noise arrives. Shear wave velocity profiles computed from Rayleigh and Love wave dispersion curves using the Neighborhood Algorithm are in good agreement with the results of a previous active source refraction experiment and a teleseismic receiver function and surface wave analysis. In particular, we compute a path-averaged Moho depth of ̃28 km along a ̃250 km profile. The use of both Rayleigh and Love wave measurements enables us to estimate the degree of radial anisotropy in the crust, yielding values of 2-15%. These results demonstrate that ambient noise correlation methods provide useful geophysical constraints on lithospheric structure even for nonoptimal network geometries and noise field characteristics. © 2010 by the American Geophysical Union.
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Behr, Y., Townend, J., Bannister, S. & Savage, M. (2010). Shear velocity structure of the Northland Peninsula, New Zealand, inferred from ambient noise correlations. Journal of Geophysical Research, 115(5), 1-12. https://doi.org/10.1029/2009JB006737Publisher DOI
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Journal of Geophysical ResearchVolume
115Issue
5Publication date
2010-01-01Pagination
1-12Publisher
American Geophysical Union (AGU)Publication status
PublishedContribution type
ArticleOnline publication date
2010-05-14ISSN
2169-9313eISSN
2169-9356Article number
B05309Language
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