The Analysis of the Theoretical Error of the Accuracy of Measuring the Focal Depth of Near Earthquake
详细信息
- 责任者：Zhang Chaojun (China Earthquake Networks Center ; Beijing 100045 ; China) ; Zhang Xiaodong
- 刊名：Earthquake Research in China
- 出版年：2010
- 卷期：26(2)
- 关键词：震源深度 ; focal depth
- 页码：p.156-163
- 图表：illus., 17 refs.
- 分类号：0500
- issnNo：ISSN1001-4683
- isbnNo：CN11-2008/P
摘要
The paper analyzes the influence of epicentral distance, the arrival time residuals and velocity model (crust model) on focal depth on the basis of travel time formula of near earthquake. When the velocity of wave propagation is certain, the error of focal depth increases with the epicentral distance or the location of the station and the travel time residual. When the travel time residual is certain, the error of focal depth increases with the epicentral distance and the velocity of seismic wave. The study also shows that the location error perhaps becomes bigger for shallower earthquake when the velocity is known and the travel time residual is certain. The horizontal error caused by location accuracy increases with the epicentral distance,the travel time residual and the velocity of seismic wave, and the error of focal depth increases with these factors. On the other hand, the errors of focal depth can lead to the changes of origin time, and the results that follow will change, too.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |