【摘要】 本文采用分段线性速率整体动态平差法处理了西海固地区七十年代以来的多期水准资料,并用形变场图象及数字特征量等分析了该区垂直形变场变化特征及其与地震活动的关系。认为该区自1981年以后区域应力逐渐增强,再经1990年前后应力场调整,目前已恢复到正常的继承性运动状态。更多还原

【Abstract】 Using the integral dynamic adjustment of the piece—wise liner velocity, the paper processes the geodetic levelling data of the Xihaigu area since the seventies, and analyses the evolutional characters of vertical deformation field and relation between the characteristics and earthquake activities by the deformation field picture and characteristic value. It is considered that the stress field was gradually strengthened in the area after 1981. Before and after 1990, the stress field was adjusted and has been recovered to normal succession tectonic movement.更多还原