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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Aquifer deformation and active faulting in Salt Lake Valley, Utah, USA
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Aquifer deformation and active faulting in Salt Lake Valley, Utah, USA

机译：美国犹他州盐湖谷的含水层变形和活性断裂

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摘要

Aquifers and fault zones may interact through groundwater flow and stress redistribution, yet their spatiotemporal relationship remains enigmatic. Here we quantify changes in water storage and associated stress along the Wasatch Fault Zone in Salt Lake Valley, recently shaken by a M5.7 earthquake on March 18th, 2020. Ground deformation mapped by Sentinel-1 SAR imagery (2014-2019) reveals an elongated area with similar to 50-mm seasonal uplift corresponding to 0.03-0.06-km(3) water storage cycles. Phase shifts across active faults in both water level and deformation suggest control by the low-permeability structures. The seasonal stress changes on the adjoining faults from poroelastic volume strain are two orders of magnitude larger than those from hydrological surface loading, but both are small compared to the annual increase of tectonic loading at seismogenic depths. Historic seismic events, limited in number, do not exhibit statistically significant annual periodicity and hydrological modulation of microseismicity or triggering of the recent M5.7 event is not evident. (C) 2020 Elsevier B.V. All rights reserved.
机译：含水层和故障区可以通过地下水流和应力再分布来互动，但它们的时空关系仍然是神秘的。在这里，我们在2020年3月18日，盐湖谷的储存故障区沿着盐湖谷的储存断层区的变化和相关压力的变化。由Sentinel-1 SAR Imagery（2014-2019）映射的地面变形揭示了一个具有与50mm季节隆起相似的细长区域，相当于0.03-0.06 km（3）储水循环。相移横跨水位和变形的活动故障，并通过低渗透结构来控制控制。来自多孔弹性体积应变的邻近断层的季节性应力变化比水文表面负荷大的两个数量级，但两者都很小，而同时均较小，同时均匀与地膜发生深度的构造载荷量增加。历史地震事件，数量有限，不表现出统计上大量的年度周期性和对微震性的水文调节或触发最近的M5.7事件并不明显。 （c）2020 Elsevier B.v.保留所有权利。

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