Validating Accuracy of Rayleigh-Wave Dispersion Extracted from Ambient Seismic Noise Via Comparison with Data from a Ground-Truth Earthquake

Bao, F., Ni, S., Xie, J., Zeng, X., Li, Z. and Li, Z. (2014) Validating Accuracy of Rayleigh-Wave Dispersion Extracted from Ambient Seismic Noise Via Comparison with Data from a Ground-Truth Earthquake. Bulletin of the Seismological Society of America, 104(4), pp. 2133-2141. (doi: 10.1785/0120130279)

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Abstract

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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Zhenhong
Authors: Bao, F., Ni, S., Xie, J., Zeng, X., Li, Z., and Li, Z.
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Bulletin of the Seismological Society of America
Publisher:Seismological Society of America
ISSN:0037-1106
ISSN (Online):1943-3573

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