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- Title
Crustal Imaging With Bayesian Inversion of Teleseismic P Wave Coda Autocorrelation.
- Authors
Tork Qashqai, Mehdi; Saygin, Erdinc; Kennett, B. L. N.
- Abstract
The autocorrelation of the seismic transmission response of a layered medium (autocorrelogram), in the presence of a free surface, corresponds to the reflection response. Despite many studies on the imaging of local structures through retrieval and forward modeling of stacked autocorrelograms, there is limited work on the inversion of these data. In this study, we demonstrate that the probabilistic inversion of autocorrelograms is efficient and can be used as an alternative imaging tool when other approaches are not applicable. Here, we calculate autocorrelograms of teleseismic P wave coda recorded on more than 1,200 permanent and temporary seismic stations across Australia and utilize a Bayesian framework to invert these data for crustal imaging. The results show patterns of structures consistent with those seen in previous crustal models constructed from receiver function, seismic reflection, and refraction methods. The new approach can therefore image large‐scale crustal structures comparable to those from other seismological methods. Key Points: We develop a new approach for crustal imaging by utilizing teleseismic P wave coda autocorrelogramsWe retrieve zero‐offset reflections from teleseismic P wave coda to image the crustal structure of Australia through a Bayesian inversionThe results of the probabilistic inversion are consistent with previous crustal models derived from multiple classes of information
- Subjects
SEISMIC wave studies; IMAGE processing in earth sciences; DATA analysis; GEOPHYSICS research; BAYESIAN analysis
- Publication
Journal of Geophysical Research. Solid Earth, 2019, Vol 124, Issue 6, p5888
- ISSN
2169-9313
- Publication type
Article
- DOI
10.1029/2018JB017055