【摘要】 利用山东数字地震台网记录资料,根据陈培善等用地震发生的断裂力学模式和震源谱理论,导出的震源处峰值加速度与构造环境剪应力值的关系,计算了山东长岛地区发生的中小地震构造环境剪应力值,并对应力场的分布状况和时空变化进行了分析。结果表明:剪应力τ值随矩震级(ML)的增大而增大,对两者作拟合得到它们之间较简单的关系为:τ=1.89 ML-1.76。在所研究的区域范围内,其构造环境剪应力τ值为1.0～6.0兆帕,与陈培善对3.0～5.5级地震的τ值多在4～8兆帕之间这一统计结果基本一致。更多还原

【Abstract】 Based on the digital observation data recorded by the seismological digital seismic network of Shandong Province,rupture mechanics model and seismic focus theory by CHEN Peishan,this paper educes the relation between peak value acceleration and structural shearing stress value,calculates the stress value from earthquakes occurred in Changdao area,and analyzes the time and space distribution characteristics of stress field.The result shows that the shear stress τ is increasing with the moment magnitude ML,and by fitting τ and ML,the authors can get the simple relationship between them,that is τ = 1.89 ML-1.76.In the study area,the tectonic ambient shear stress τ is between 1.0 to 6.0 MPa.It is consistent with the results in Chen Peishan’s article,which shows that the τ value is between 4 to 8 MPa which magnitudes are 3.0 to 5.5.更多还原