威海地震台阵勘选测试及数据相关性分析

Survey test of Weihai Seismic Array and correlation analysis of data

通过连续观测数据记录,利用Welch算法,对山东威海地震台阵勘选设计的9个测点进行背景噪声功率谱估计,结果符合台站观测环境要求。对勘选测点记录的近震和远震震相进行相关性分析,结果显示,威海地震台阵内圈最佳布设半径为500 m—1 km,外圈最佳布设半径为1.8—2.5 km,可作为台阵布局设计依据。综合分析表明,初选台址观测效果较好,符合地震台阵建设要求,可为后期台阵建设提供指导。

Through the continuous observation data,the Welch algorithm is used to estimate the background noise power spectrum of 9 observation points designed for the survey of Weihai Seismic Array in Shandong Province,and the results meet the observation environment requirements of the stations.The correlation of seismic phases between the near and far earthquakes recorded at the survey points shows that the optimal deployment radius of the Weihai Seismic Array is 0.5-1 km in the inner circle and 2-3 km in the outer circle,which can be used as the basis for the array layout design.The comprehensive analysis results show that the effect of the original selection of the seismic array is good,which meets the requirements of the seismic array construction,and can provide guidance for the later construction of the seismic array.