地震预警台站在地震定位中的应用——以四川泸定MS6.8地震为例
Application of Earthquake Early Warning Station in Earthquake Positioning:A Case Study of the MS6.8 Earthquake in Luding,Sichuan
侯泽宇 1马康熙 1朱永莉 1王宇航 1李萍萍1
作者信息
- 1. 四川省地震局,四川 成都 610041
- 折叠
摘要
为了研究预警台站在地震定位中的应用效果,本文以 2022 年 9 月 5 日四川泸定MS6.8 地震为例,基于地震预警台站观测资料,使用LOC3D定位方法对主震及 2022 年 9 月 9 日前MS≥3.0 余震进行重定位.结果表明:泸定MS6.8 地震震中位置与人工目录结果基本一致;预警台站观测资料的加入能够增加各个方位的台站覆盖率,增加近台数量,提供地震事件S波完整震相,有效地约束地震定位结果中的震源深度,提升了地震定位精度,为地震定位提供更全面有效的数据支撑.
Abstract
In this paper,the MS6.8 earthquake in Luding,Sichuan Province,on September 5,2022 was used as an example.The observation data of earthquake early warning stations were used to study the application of early warning stations in earthquake positioning.The relocation results showed that the epicenter position of the Luding 6.8 earthquake was basically consistent with the rapid report cataloguing results,whereas the focal depth was reduced to 7.7 km.The addition of observation data of early warning stations can increase the coverage of stations in various directions,which can be helpful in the following aspects,such as 1)increasing the number of near stations,2)providing the complete phase of S-wave seismic events,3)effectively constraining the source depth in the seismic positioning results,4)improving the accuracy of seismic positioning,and 5)providing more comprehensive and effective data support for seismic positioning.
关键词
地震定位/地震预警台站/泸定MS6.8地震Key words
earthquake location/earthquake warning station/Luding MS6.8 earthquake引用本文复制引用
基金项目
四川省地震局地震科技专项(LY2404)
四川省地震局地震科技专项(LY2305)
出版年
2024
NETL
NSTL
万方数据