跨断裂GPS观测阵列选点分析

Analysis of Points Selection for GPS Observation Array of Cross-Fault

地震大多发生在主要活动断裂带及其附近,多年来采用GPS技术用于大面积地壳水平运动场和主要断裂地块活动与变形的研究,因此GPS观测墩在跨断裂上的选址对于后期断层形变的监测与研究就显得非常重要。为此,文章基于福建省地震局的"福建省地震监测预警与社会服务系统工程"项目,以跨过沙县—南日岛断裂之泉港—福清观测阵列为主,综合地质构造、测量规范与地震活动性对其辖区内的GPS点进行勘选,为以后跨断裂GPS观测阵列选点提供参考。

Most of the earthquakes occur in the main active fault zone and its neighbouring zone. In recent years, GPS technology has been used to study the activity and deformation of the horizontal crustal moving field in large area and the main faults. Therefore, the location of the GPS observation pier on the cross-fault is very important for the monitoring and research of the fault deformation in future. In this paper, based on the ＂Fujian Earthquake Monitoring and Warning and Social Service System Engineering＂ project of Fujian Seismological Bureau, on account of Quangang-Fuqing observation array of crossing Shaxian County-Nanri Island fault zones, the selection of GPS observation points in the area is a comprehensive examination of these factors such as geological structure, measurement specification and seismic activity, which can provide some references for the points selection of GPS observation array in cross-fault zones in future.