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. doi:10.1002/grl.50907. https://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.
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| 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 | |||||||||
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| Subject Keywords: | Seismic interferometry; body wave; cross-correlation; coda; ambient noise; core phases | |||||||||
| Issue or Number: | 17 | |||||||||
| DOI: | 10.1002/grl.50907 | |||||||||
| Record Number: | CaltechAUTHORS:20131108-135759821 | |||||||||
| Persistent URL: | https://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: | 10 Nov 2021 16:21 |
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