Earthquake Location Method with Arrival Time Uncertainty Considered and Its Application to Location of Earthquakes from 2001 to 2008 in Sichuan
详细信息
- 责任者：Wan Yongge (Institute of Disaster Prevention ; Yanjiao 065201 ; China) ; Sheng Shuzhong
- 刊名：Seismology and Geology
- 出版年：2012
- 卷期：34(1)
- 关键词：地震定位 ; seismic location ; 四川 ; Sichuan Province
- 页码：p.1-10
- 图表：3 illus., 2 tables, 22 refs.
- 分类号：0500
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
By considering the arrival time uncertainty,and the constraints on station elevation and seismic depth, the authors propose a relatively accurate method to estimate hypocentral location and its uncertaintybased on inversion theory. The method can combine the arrival times of Pg wave, Sg wave, Pn wave and Sn wave in hypocenter location,so it increases the location accuracy by involving more data. And it can be also used in local and regional earthquake location simultaneously. In order to test the location method, the authors located earthquakes by using the simulated data with different uncertainty of Pg, Sg, Pn, Sn arrivals. The result shows that the location determined by using the method is more accurate than that by using other method. The authors apply it to earthquakes occurring in the period from 2001 to 2008 in Sichuan area, and obtained a more clustered hypocentral distribution convergent to the fault zones.