Application of Earthquake Early Warning Station in Earthquake Positioning:A Case Study of the MS6.8 Earthquake in Luding,Sichuan
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.
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