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

研究成果: Article査読

2 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1001-1011
ページ数11
ジャーナルDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences
34
6
DOI
出版ステータスPublished - 2009 11

ASJC Scopus subject areas

  • 建築および建設
  • コンピュータ サイエンスの応用
  • 地球惑星科学(全般)

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