【摘要】 研究地震发生的重点是研究震源的问题,测定小震震源参数是研究震源及区域性构造应力状态的一项基础工作。本文利用首都圈范围内(39.5°～41.5°N,117.5°～119°E)20个地震台记录的数字波形资料,采用振幅比的方法(Pg初动方向、Pg的到时、Pg与Sg的最大振幅等资料),计算了唐山地区2003年1月至12月ML≥1.5的小震震源机制解,并对所得结果进行了初步讨论。更多还原

【Abstract】 To study the occurrence of the earthquake focus is to study the focus and mesuring the small earthquake source parameters is a basic job for studying the source and regional tectonic stress state.The authors used the digital wave data of the Chinese capital area (39.5°～41.5°N,117.5°～119°E) recorded by 20 seismic stations, with the amplitude ratio method (first motion direction of Pg, arrival time of Pg, the maximum amplitude of Pg and Sg, etc.), worked out the fault plane solution to the small earthquakes ML≥1.5 between January and December 2003 in Tangshan, and preliminarily analyzed the results.更多还原