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EARTHQUAKE ›› 2014, Vol. 34 ›› Issue (3): 62-73.

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Monitoring Media V elocity Variations with Coda Wave Interferometry

ZHANG Jin-chuan, WANG Qin-cai, XUE Bing, Ding Li-sha   

  1. Institute of Eart hquake Science, CEA, Beijing 100036, China
  • Received:2014-02-24 Revised:2014-03-26 Online:2014-07-31 Published:2020-09-08

Abstract: Multiply scattered waves are sensitive to media changes owing to the effect of re-peated sampling, superposition and amplification. Based on this characteristic, small medi-um changes could be detected by using coda wave interferometry. In recent years, coda wave interferometry is widely used in estimating velocity variation with high precision in areas such as seismology and non-destructive testing. This paper systematically presents the principle, method and research status of coda wave interferometry respectively, especially focusing on research advances of media velocity variations by using repeating earth-quake,artificial source, and ambient seismic noise. Applications of coda wave interferome try can contribute to the more subtle understanding of dynamic evolution process in the medium.

Key words: Coda wave interferometry, Cross-correlation, Velocity variat ions, Repeating earthquakes, Ambient seismic noise

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