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- 2018
地震破裂模型约束的中国阿里地震三维形变场
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Abstract:
利用环境卫星（Environmental Satellite，Envisat）的升、降轨数据在地震破裂模型约束下获取2007年阿里地震的高质量同震地表三维形变场。首先，对合成孔径雷达（synthetic aperture radar，SAR）影像进行差分干涉处理，得到地震造成的视线向同震地表形变场；然后，以地震破裂模型为约束条件，采用赫尔默特方差分量估计法来解算阿里地震的高质量地表三维同震形变场。结果表明，震中区域最大下沉达约4.7 cm，东西向位移较小，南北向呈挤压趋势。总体上，三维形变的特征表明阿里地震是一个以正倾滑为主兼少量右旋走滑运动的地震事件
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