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首页> 外文期刊>Seismological research letters >Rupture Process of the M_w 5.8 Pawnee, Oklahoma, Earthquake from Sentinel-1 InSAR and Seismological Data
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Rupture Process of the M_w 5.8 Pawnee, Oklahoma, Earthquake from Sentinel-1 InSAR and Seismological Data

机译：M_W 5.8 Pawnee，俄克拉荷马州的破裂过程，来自Sentinel-1 insar和地震数据的地震

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摘要

Since 2009, Oklahoma has experienced a soar in induced seismicity, a side effect of extensive saltwater injection into subsurface sedimentary rocks. The seismic hazard entailed by these regional-scale injection operations is, however, difficult to assess. The 3 September 2016 M_w 5.8 Pawnee earthquake is the largest since the increase of seismic activity. The event was preceded by an mj, 3.2 foreshock two days prior, and changes in injection rates have been reported on wastewater disposal wells located less than 10 km from the epicenter, suggesting that the earthquake may have been induced. Using Sentinel-1 spaceborne interferometric synthetic aperture radar, we unambiguously show that the earthquake produced peak-to-peak line-of-sight displacement of 3 cm at the surface. Kinematic inversion of geodetic and seismological data shows that the main seismic rupture occurred between a depth of 4 and 9 km, over a length of 8 km, with slip reaching at least 40 cm. The causative fault is entirely buried within the Precambrian basement, that is, well beneath the Paleozoic sedimentary pile where injection is taking place. Potentially seismogenic faults in the basement of Oklahoma being poorly known, the risk of M_w ≥ 6 events triggered by fluid injection remains an open question.
机译：自2009年以来，俄克拉荷马州在诱导地震性中经历了飙升，侧面盐水注射进入地下沉积岩的副作用。然而，这些区域规模注射操作所引入的地震危险难以评估。 2016年9月3日M_W 5.8 Pawnee地震是由于地震活动增加以来最大的地震。该事件前面是MJ，3.2前两天前两天，距离震中不到10公里的废水处理井报告了注射率的变化，表明地震可能已经诱导。使用Sentinel-1总是干涉性合成孔径雷达，我们明确表明地震产生了3厘米在表面的峰值峰值峰值位移。大地测量和地震数据的运动反转表明，主要地震破裂发生在4至9公里的深度之间，长度为8km，滑动达到至少40厘米。致病故障完全埋在预先掩盖的地下室，即古生代沉积物桩下面正在进行喷射。奥克拉荷马群地下室的潜在发酵缺陷是众所周知的，M_W≥6因流体喷射触发的事件的风险仍然是一个开放的问题。

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