首页> 外文期刊>Bulletin of the Seismological Society of America >The Wilmington Blind-Thrust Fault: An Active Concealed Earthquake Source beneath Los Angeles, California
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The Wilmington Blind-Thrust Fault: An Active Concealed Earthquake Source beneath Los Angeles, California

机译:威尔明顿盲 - 推力故障:加利福尼亚州洛杉矶下方的活跃隐藏的地震源

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摘要

We define the Wilmington blind-thrust as a tectonically active fault capable of generating large damaging earthquakes, through analysis of 2D and 3D seismic reflection surveys, petroleum and water wells, and recent mapping of groundwater aquifers in the southwestern Los Angeles basin. This overturns the long-held view that the fault became dormant in the Late Pliocene, barring its inclusion in state-of-the-art regional earthquake hazard assessments. The size of the fault suggests that it is capable of generating moderate-magnitude earthquakes (M-w 6.3-6.4), whereas potential linkages with other nearby faults (e.g., Huntington Beach, Torrance, and Compton) pose the threat of larger multisegment events (M-w > 7). These earthquakes would directly impact the overlying Ports of Los Angeles and Long Beach, as well as the broader Los Angeles metropolitan area.
机译:我们将威尔明顿盲 - 推力定义为能够通过分析2D和3D地震反射调查,石油和水井的分析,以及最近在洛杉矶盆地西南地下水含水层的地下水含水层的映射。 这倾向于长期持久的观点,即在后期的全冠军中发生故障,禁止其纳入最先进的地震危害评估。 故障的大小表明它能够产生中等幅度地震(MW 6.3-6.4),而与其他附近的故障(例如,Huntington Beach,Torrance和Compon)潜在联系构成了更大的多段事件的威胁(MW > 7)。 这些地震将直接影响洛杉矶和长滩的覆盖港,以及更广泛的洛杉矶大都市地区。

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