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Coseismic slip inversion based on InSAR arc measurements

机译:基于InSAR电弧测量的等震滑动反演

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摘要

We present a new method for inverting coseismic slip distribution based on arc measurements of InSAR interferograms. The method only solves the integer ambiguities on the selected arcs so that the challenging task from global unwrapping of low coherence interferograms can be avoided. The simulated experiment results show that the new method recovered the given slip distribution well at different coherence quality levels. However, the conventional method with global interferogram unwrapping fails when the interferogram has some isolated areas. In addition, the new method is capable of using surface rupture offset data gathered in the field. We apply the proposed method to study the 2010 Yushu, China Ms 7.1 earthquake. Inclusion of field data can help to enhance the results of fault slip inversion. It derives a maximum slip of ~3 m, larger than the published coseismic slip results on this event, but agreeing with the largest offset of 3.2m from field investigation.
机译:我们提出了一种基于InSAR干涉图弧度测量的反同震滑动分布反演的新方法。该方法仅解决了选定弧线上的整数模糊度,因此可以避免低相干干涉图的整体展开带来的挑战性任务。仿真实验结果表明,新方法在不同相干质量水平下都能很好地恢复给定的滑动分布。但是,当干涉图具有一些孤立区域时,使用全局干涉图展开的常规方法将失败。另外,新方法能够使用现场收集的表面破裂补偿数据。我们将提出的方法应用于研究2010年玉树,中国7.1级地震。包含现场数据可以帮助增强断层滑动反演的结果。它得出的最大滑动量约为3 m,大于该事件中已发表的同震滑动结果,但与野外调查得出的最大偏移量3.2 m一致。

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