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Shear velocity structure of the Northland Peninsula, New Zealand, inferred from ambient noise correlations

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journal contribution
posted on 10.02.2021, 22:09 by Y Behr, John Townend, S Bannister, Martha Savage
Ambient 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.

History

Preferred citation

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/10.1029/2009JB006737

Journal title

Journal of Geophysical Research

Volume

115

Issue

5

Publication date

01/01/2010

Pagination

1-12

Publisher

American Geophysical Union (AGU)

Publication status

Published

Contribution type

Article

Online publication date

14/05/2010

ISSN

2169-9313

eISSN

2169-9356

Article number

B05309

Language

en