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Feasibility Study on Determining Focal Mechanism Solutions of Small Earthquakes Using the Velocity Amplitude Ratio of P-and S-Waves

Zhang Yongjiu Cheng Wanzheng

中国地震研究(英文版)2008,Vol.22Issue(3):276-285,10.
中国地震研究(英文版)2008,Vol.22Issue(3):276-285,10.

Feasibility Study on Determining Focal Mechanism Solutions of Small Earthquakes Using the Velocity Amplitude Ratio of P-and S-Waves

Feasibility Study on Determining Focal Mechanism Solutions of Small Earthquakes Using the Velocity Amplitude Ratio of P-and S-Waves

Zhang Yongjiu 1Cheng Wanzheng1

作者信息

  • 1. Earthquake Administration of Sichuan Province,Chengdu 610041,China
  • 折叠

摘要

Abstract

The focal mechanism parameters of small earthquakes are determined by the maximum velocity and displacement amplitude ratio of the direct P-and S-waves recorded by digital stations. The displacement is obtained from the velocity by emulation, and the two results are compared and analyzed. Results of the oretical analysis and practical measurement indicate that the two results of velocity and displacement are consistent, and it is feasible that the maximum displacement amplitude ratio be replaced by the maximum velocity amplitude ratio of the direct P-and S-waves recorded by regional seismic networks when determining focal mechanism solutions of small earthquakes.

关键词

Focal mechanism solution/Velocity/Displacement/Amplitude ratio

Key words

Focal mechanism solution/Velocity/Displacement/Amplitude ratio

分类

天文与地球科学

引用本文复制引用

Zhang Yongjiu,Cheng Wanzheng..Feasibility Study on Determining Focal Mechanism Solutions of Small Earthquakes Using the Velocity Amplitude Ratio of P-and S-Waves[J].中国地震研究(英文版),2008,22(3):276-285,10.

基金项目

This project was sponsored by the "Strong EarthquakeMonitoring and Prediction Research" for the 11 th "Five-Year Plan" under the grant No. 2006BA (01B02-01-01), sub-special subject of 2006BAC01B02-01-01 and the State Key Basic Research Development Program (2004CB418404),China. (01B02-01-01)

中国地震研究(英文版)

2096-9996

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