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Seismic interferometry with antipodal station pairs

Lin, Fan-Chi and Tsai, Victor C. (2013) Seismic interferometry with antipodal station pairs. Geophysical Research Letters, 40 (17). pp. 4609-4613. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20131108-135759821

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Abstract

In this study, we analyze continuous data from all Global Seismographic Network stations between year 2000 and 2009 and demonstrate that several body wave phases (e.g., PP, PcPPKP, SKSP, and PPS) propagating between nearly antipodal station pairs can be clearly observed without array stacking using the noise/coda cross-correlation method. Based on temporal correlations with global seismicity, we show that the observed body waves are clearly earthquake related. Moreover, based on single-earthquake analysis, we show that the earthquake coda energy observed between ~10,000 and 30,000 s after a large earthquake contributes the majority of the signal. We refine our method based on these observations and show that the signal can be significantly improved by selecting only earthquake coda times. With our improved processing, the PKIKP phase, which does not benefit from the focusing effect near the antipode, can now also clearly be observed for long-distance station pairs.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/grl.50907 DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/grl.50907/abstractPublisherArticle
ORCID:
AuthorORCID
Tsai, Victor C.0000-0003-1809-6672
Additional Information:© 2013 American Geophysical Union. Received 25 June 2013; revised 19 August 2013; accepted 24 August 2013; published 11 September 2013. The authors thank Xiaodong Song, Vernon F. Cormier, Rob W. Clayton, Donald V. Helmberger, and Zacharie Duputel for comments that helped to improve this paper. All data used in this paper were obtained from the IRIS-DMC. This work has been supported by the NSF grant EAR-1316348. The Editor thanks Xiaodong Song and an anonymous reviewer for their assistance in evaluating this paper.
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
NSFEAR-1316348
Subject Keywords:Seismic interferometry; body wave; cross-correlation; coda; ambient noise; core phases
Record Number:CaltechAUTHORS:20131108-135759821
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20131108-135759821
Official Citation:Lin, F.-C., and V. C. Tsai (2013), Seismic interferometry with antipodal station pairs, Geophys. Res. Lett., 40, 4609–4613, doi:10.1002/grl.50907
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42343
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Nov 2013 22:10
Last Modified:23 Nov 2016 19:39

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