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Multiple source analysis from InSAR data and new insights into fault activation: The 2005 Zarand, Iran, earthquake

机译:insar数据的多种源分析以及对故障激活的新见解:2005年Zarand,伊朗,地震

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We have reinterpreted the causative fault parameters of the 2005 Zarand earthquake in the light of a new imagery study using Interferometric Synthetic Aperture Radar (InSAR). By conducting a joint inversion of two InSAR datasets, we can characterize the rupture as it relates to complex local structures. At first, the mainshock ruptured a nearly pure reverse fault, dipping similar to 65 degrees NNW in the basement below the southeastern area of Zarand. Two more fault segments were subsequently activated: an oblique-normal fault segment parallel to the first segment, dipping 61 degrees to the south, and a normal-oblique fault segment at the eastern termination of the rupture zone. The first fault segment ruptured the surface, while slip along the other two segments was confined to the lower sedimentary strata.
机译:根据一项使用干涉合成孔径雷达(InSAR)的新图像研究,我们重新解释了2005年扎兰德地震的致因断层参数。通过对两个InSAR数据集进行联合反演,我们可以描述与复杂局部结构相关的破裂。起初,主震破裂了一条几乎纯逆断层,在Zarand东南部地区下方的基底中向西北偏北65度倾斜。随后又激活了两个断层段:一个与第一段平行的斜向正断层段,向南倾斜61度,以及一个位于断裂带东端的正向斜断层段。第一个断层段使地表破裂,而沿其他两个断层段的滑动仅限于较低的沉积地层。

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