Reactivated faulting near Cushing, Oklahoma: Increased potential for a triggered earthquake in an area of United States strategic infrastructure
Reactivated faulting near Cushing, Oklahoma: Increased potential for a triggered earthquake in an area of United States strategic infrastructure
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DOI：
10.1002/2015gl064669
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发表时间：
2015-10
影响因子：
5.2
通讯作者：
D. McNamara;G. Hayes;H. Benz;R. Williams;N. McMahon;R. Aster;A. Holland;T. Sickbert;R. Herrmann;R. Briggs;G. Smoczyk;E. Bergman;P. Earle
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文献类型：
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作者：
D. McNamara;G. Hayes;H. Benz;R. Williams;N. McMahon;R. Aster;A. Holland;T. Sickbert;R. Herrmann;R. Briggs;G. Smoczyk;E. Bergman;P. Earle
2014 年 10 月，俄克拉荷马州库欣以南发生了两次中型地震（震级 4.0 级和 4.3 级），地震地点位于世界上最大的原油储存设施下方。对地震空间分布和区域矩张量震源机制的综合分析表明，地下未命名和未绘制的左旋走滑断层重新活动。使用根据区域矩张量确定的重新定位的地震活动和滑移分布进行库仑破坏应力变化计算，考虑到俄克拉荷马州库欣以南的威尔泽塔-怀特泰尔断层带可能会产生一场与 2011 年布拉格事件相当的破坏性大地震。震中地区由此产生的非常强烈的震动级别（MMI VII）表明，这次潜在的地震有可能对国家战略基础设施和当地社区造成中度至重度损害。
In October 2014 two moderate‐sized earthquakes (Mw 4.0 and 4.3) struck south of Cushing, Oklahoma, below the largest crude oil storage facility in the world. Combined analysis of the spatial distribution of earthquakes and regional moment tensor focal mechanisms indicate reactivation of a subsurface unnamed and unmapped left‐lateral strike‐slip fault. Coulomb failure stress change calculations using the relocated seismicity and slip distribution determined from regional moment tensors, allow for the possibility that the Wilzetta‐Whitetail fault zone south of Cushing, Oklahoma, could produce a large, damaging earthquake comparable to the 2011 Prague event. Resultant very strong shaking levels (MMI VII) in the epicentral region present the possibility of this potential earthquake causing moderate to heavy damage to national strategic infrastructure and local communities.