利用单台数字地震记录反演天祝-古浪5.4级地震矩张量  

INVERTION OF THE SEISMIC MOMENT TENSOR OF TIANZHU-GULANG EARTHQUAKE(M5.4) USING THE THREE COMPONENTS DIGITAL RECORD OF SINGLE STATION

作　　者：荣代潞[1] 李亚荣[1] 金铭[1] 蒋续媛 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000

出　　处：《高原地震》2000年第2期32-36,共5页Plateau Earthquake Research

基　　金：地震科学联合基金重点项目!( 95- 0 7- 436 )资助

摘　　要：利用单台 3分向数字化记录反演了 1996年 6月 1日甘肃天祝 -古浪 5 .4级地震的矩张量 ,并对所得结果与用 P波初动符号的结果进行了比较。结果表明 ,二者具有很好的一致性。结合该地震的震源机制和震源区的断层构造情况 ,认为该地震是在 NE- SW的压应力作用下 ,近 EW向的海原西断层天祝 -古浪段左旋破裂错动的结果。由于我们得出的结果只是利用了记录波形的最初几个波形 ,因此它基本反映了该地震的初始破裂错动情况。The seismic moment tensor of Tianzhu Gulang earthquake(M5.4,June 1,1996)has been inverted using the 3 components digital record of single station and compared with the result obtained from the initial motion of P wave.The two results show identically.Combining with the source mechanism of the earthquake and the fault structure in the source area,the authors have considered that the earthquake is the result of the left lateral dislocation of the segment of the west Haiyuan fault which is in EW direction.It shows the initial rupturing and dislocating of the earthquake.

关 键 词：数字地震记录 矩张量反演 天祝-古浪地震 

分 类 号：P315.63[天文地球—地震学]