Locating deep earthquakes in complex 3-D velocity structure using a modified double-difference location method

Guo Ming Jiang, Da Peng Zhao, Gui Bin Zhang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The double-difference (DD) earthquake location algorithm cannot be used to locate earthquakes in the complex 3-D velocity models because it adopts a 1-D ray tracing technique and the Cartesian coordinates. In this study, we have improved the DD location method by adopting a 3-D ray tracing method and the spherical coordinates, and thus extended the range of its applications. To testify the feasibility and the precision of this new method, we have relocated the deep earthquakes that occurred beneath the Japan Sea, and analyzed the effect of velocity models by comparing the relocation results in four kinds of 3-D velocity models. Our results show that the improved DD location method is less affected by the velocity model, and the closer the velocity structure in the hypocenter to the real one is, the higher the location precision is. The improved DD location technique would be very useful for studying the mantle structure by using data from deep earthquakes.

Original languageEnglish
Pages (from-to)1001-1011
Number of pages11
JournalDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences
Volume34
Issue number6
DOIs
Publication statusPublished - 2009 Nov

Keywords

  • 3-D velocity model
  • Double-difference location
  • Earthquakes
  • Japan Sea

ASJC Scopus subject areas

  • Building and Construction
  • Computer Science Applications
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Locating deep earthquakes in complex 3-D velocity structure using a modified double-difference location method'. Together they form a unique fingerprint.

Cite this