Pure and Applied Geophysics

, Volume 171, Issue 3–5, pp 425–437 | Cite as

Cross-correlation Coefficients for the Study of Repeating Earthquakes: An Investigation of Two Empirical Assumptions/Conventions in Seismological Interpretation Practice

  • Libo Han
  • Zhongliang Wu
  • Yutong Li
  • Changsheng Jiang
Article

Abstract

For the identification and analysis of ‘repeating earthquakes,’ there are two empirical concepts. The first is the assumption that the cross-correlation coefficient of the filtered seismograms of closely spaced ‘repeaters’ depends exponentially on the inter-event separation distance. The second is the convention that in processing regional seismograms, a 0.5–5.0-Hz band pass filter is used. In this article, using a simple layered structure model, we investigated the cross-correlation coefficient of the filtered synthetic seismograms of two closely located events, that is, a ‘doublet.’ We investigated the relation between the cross-correlation coefficient and the inter-event separation distance. Simulation shows that in the 0.5–5.0-Hz frequency band, even if for simple synthetic seismograms without considering lateral heterogeneity or scattering, the exponential dependence is only a first order approximation concept. To check the frequency dependence of the cross-correlation coefficient, we analyzed a group of seismograms of a ‘multiplet’ in Xiuyan, Liaoning, northeast China, recorded by the Regional Seismographic Network of Liaoning Province. The cross-correlation coefficients were observed to be relatively stable against frequency for the 0.5–5.0-Hz frequency band.

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Copyright information

© Springer Basel AG 2012

Authors and Affiliations

  • Libo Han
    • 1
  • Zhongliang Wu
    • 1
    • 2
  • Yutong Li
    • 3
  • Changsheng Jiang
    • 1
  1. 1.Institute of GeophysicsChina Earthquake AdministrationBeijingChina
  2. 2.Laboratory of Computational GeodynamicsGraduate University of the Chinese Academy of SciencesBeijingChina
  3. 3.Earthquake Administration of Liaoning ProvinceShenyangChina

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