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Lookup NU author(s): Professor Zhenhong Li
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
In order to validate the accuracy of estimated Green’s functions (EGFs), which are widely used in ambient seismic noise tomography, a broadband seismograph was installed in the epicentral area of an M 5 earthquake, with ground‐truth location from Interferometric Synthetic Aperture Radar observations. EGFs between this station and permanent stations are compared with surface waves excited by the earthquake. The group velocity dispersion measured from EGFs at large interstation distances (∼1000 km or longer) are consistent with measurements from the earthquake, and the EGFs from symmetric noise correlation functions (NCFs) are usually more accurate. At shorter interstation distances (300–1000 km), the match between noise and earthquake dispersion is good for most stations, although we observed mismatch for a few stations. The mismatch is probably caused by low signal‐to‐noise ratio of NCFs or nondiffusive noise wavefield at short distances.
Author(s): Bao F, Ni S, Xie J, Zeng X, Li Z, Li Z
Publication type: Article
Publication status: Published
Journal: Bulletin of the Seismological Society of America
Year: 2014
Volume: 104
Issue: 4
Pages: 2133-2141
Print publication date: 10/06/2014
Online publication date: 10/06/2014
Date deposited: 04/07/2014
ISSN (print): 0037-1106
ISSN (electronic): 1943-3573
Publisher: Seismological Society of America
URL: http://dx.doi.org/10.1785/0120130279
DOI: 10.1785/0120130279
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