【摘要】 本文简要介绍了山丹地应力监测台站的概况,用多种方法对该台站安装的TYB-2000A体应变仪在2007年8月至2008年7月记录的174次MS4.0~MS8.6地震数据进行了处理与分析,其中汶川地震及余震共85次,并与其他台站记录的地震资料进行比对,对记录的应变地震波、同震应变阶跃、地震前后地球自由振荡的变化及其所包含的物理意义等信息深入分析,揭示出地震前后应变波的变化规律,为今后的地震预测和灾害防治提供了科学依据。更多还原

【Abstract】 The authors analyzed the volume strain data recorded from July 2007 to July 2008 in the Shandan in-situ stress monitoring station by using the statistical method,made a correlation of these seismic data with those recorded from other stations and studied the strain seismic waves,comseismic strain step and its contained physical significance,thus revealing the nature of the seismic strain waves.The data trends had pronounced anomalies.The effect of comseismic variation observed by the volume strain seismograph in the Shandan in-situ stress monitoring station was mainly the tensional step.更多还原