Sacks体应变地震波的观测结果分析  

ON OBSERVATION RESULTS OF SEISMIC WAVE OF SACKS BODY STRAIN

作　　者：张凌空[1] 牛安福[1] 

机构地区：[1]中国地震台网中心,北京100045

出　　处：《大地测量与地球动力学》2009年第5期33-37,共5页Journal of Geodesy and Geodynamics

基　　金：地震行业科研专项(200808079)

摘　　要：研究宝坻台Sacks钻孔体应变仪的地震响应能力,发现它与震级及震中距有关,即体应变地震波振幅与震级和震中距的数理统计关系是随震级增大呈指数增加、随震中距增大呈幂函数衰减;分析了京津地区6台Sacks体应变仪在多次地震发生时,震时应变阶的响应特征,显示其极性(压、张)与观测点所在断层有一定关系。The seismic response capacity of Sacks borehole body strainmeter was researched. It is discovered that the capacity is connected with eathquake magnitude or epicenter distance and spread along a line. The law is found that the amplitude will increase exponentially when earthquake magnitude increase and it will decay with pow- er function when the epicente distance increase. The characters of the conseismic strain step of 6 Sacks body strainmeters in Beijing and Tianjin were analysed. It shows that there is a certain relation between the strain step＇s polarity （press and spread） with the faults which the observation stations are located on..

关 键 词：体应变地震波 振幅 震级 震中距 应变阶 

分 类 号：P315.73[天文地球—地震学]