Zhan, Zhongwen and Ni, Sidao and Helmberger, Don V. and Clayton, Robert W. (2010) Retrieval of Moho-reflected shear wave arrivals from ambient seismic noise. Geophysical Journal International, 182 (1). pp. 408-420. ISSN 0956-540X http://resolver.caltech.edu/CaltechAUTHORS:20100629-165425794
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Theoretical studies on ambient seismic noise (ASN) predict that complete Green's function between seismic stations can be retrieved from cross correlation. However, only fundamental mode surface waves emerge in most studies involving real data. Here we show that Moho-reflected body wave (SmS) and its multiples can be identified with ASN for station pairs near their critical distances in the short period band (1–5 s). We also show that an uneven distribution of noise sources, such as mining activity and wind–topography interaction, can cause surface wave precursors, which mask weaker body wave phases.
|Additional Information:||© 2010 The Authors. Journal compilation © 2010 RAS. Accepted 2010 April 13. Received 2010 April 6; in original form 2009 December 2. The authors thank the operators of the Southern Africa Seismic Experiment and CANOE array, IRIS, Earthquakes Canada for providing data used in this study. We acknowledge Ronald M. Clowes and Gabriela Fernandez Viejo for providing the velocity model of Great Slave region. The suggestions from two reviewers were very helpful to improving the paper. This work was supported by NSFC 40674027 and CAS fund kzcx2-yw-116-01 and by USGS Award #G09AP0082 at California Institute of Technology. This is contribution 10038 of the Tectonics Observatory at Caltech.|
|Subject Keywords:||Interferometry; Body waves; Crustal structure|
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|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||30 Jun 2010 18:22|
|Last Modified:||26 Dec 2012 12:11|
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