尾波干涉法在汶川地震余震定位中的应用

Translated title of the contribution: Application of coda wave interferometry method in relative location of the Wenchuan earthquake sequence

Zhen Xiao*, Yong Zheng, Xiong Xiong

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Focal depths of moderate to small earthquakes and their temporal changes are critical for understanding seismogenic structures, fault characteristics and evolution of seismic stress fields. However, traditional locating methods such as double difference method (HypoDD) require high accurate crustal structure, which is usually hard to be fulfilled. Furthermore, the precisions of these methods can be also seriously affected by seismic station distribution. On the contrary, coda wave interferometry method (CWI) doesn't need to know accurate crustal velocity structure, the only requirement for the crustal model is that there should exist relatively evenly distributed scatters, which is a very common phenomenon in shallow crust. Another advantage of CWI method is that the requirement of seismic stations distribution is also very low. Thus, the CWI method is quite suitable for studying the variation of relative distance between earthquakes. In this paper we collected the data of the 2008 Wenchuan earthquake aftershock sequence, analyzed the possibility and stability of locating earthquakes by CWI method, and finally compared with the results obtained by double difference method. Our result shows that when the distribution of seismic stations are good, the result obtained by double difference method is close to that by the CWI method, however, when the distribution pattern of seismic stations are not good, the CWI method can provide much more robust results than that of double difference method.

Original languageChinese
Pages (from-to)1-11
Number of pages11
JournalEarthquake
Volume34
Issue number2
Publication statusPublished - Apr 2014
Externally publishedYes

Bibliographical note

Transliterated article title: "wěi bō gān shè fǎ zài wèn chuān dì zhèn yú zhèn dìng wèi zhōng de yìng yòng"

Keywords

  • Coda wave interferometry
  • Similar earthquakes
  • Location variation of earthquakes
  • Aftershock sequence of the Wench uan earthquake

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  • Cite this

    Xiao, Z., Zheng, Y., & Xiong, X. (2014). 尾波干涉法在汶川地震余震定位中的应用. Earthquake, 34(2), 1-11.