【摘要】 根据天津及周边地区GNSS连续观测站资料,在计算得到各站三维站坐标时间序列结果的基础上,文章分析了天津地区GNSS基线时间序列的变化情况和水平形变变化特征。结果显示,天津地区总体呈现压扭变化,不同地段存在差异。天津地区NE-SW向和NW-SE向GNSS基线的伸长和缩短变化呈北西向条带状相间分布。日本3·11地震使天津地壳出现近东西向拉张为主的活动,一定程度上释放消减了天津地区的挤压应变。更多还原

【Abstract】 According to the data from GNSS continuous stations in Tianjin and the surrounding areas,and on the basis of calculating the time-series of three-dimensional coordinates,the paper analyzed the changes of GNSS baseline time-series and horizontal deformation characteristics in Tianjin area.The results suggested that,on the whole,twist compression deformation is presented in Tianjin area,and differences exist among various sections.The trend variations of elongated and shortened GNSS baselines of NE-SW and NW-SE directions are zonation in the space,and these zones show a northwest interphase arrangement in the plane.The nearly EW tensional tectonic activities are showed in Tianjin due to the influence of 3·11Japan Earthquake,and the compressive strain in Tianjin has been released to some extent by the effects of this earthquake.更多还原