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Considering fault interaction in estimates of absolute stress along faults in the San Gorgonio Pass region, southern California

机译：考虑到南加州南加州三戈尔诺伊通道地区绝对压力估计的故障相互作用

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Present-day shear tractions along faults of the San Gorgonio Pass region (southern California, USA) can be estimated from stressing rates provided by three-dimensional forward crustal deformation models. Due to fault interaction within the model, dextral shear stressing rates on the San Andreas and San Jacinto faults differ from rates resolved from the regional loading. In particular, fault patches with similar orientations and depths on the two faults show different stressing rates. We estimate the present-day, evolved fault tractions along faults of the San Gorgonio Pass region using the time since last earthquake, fault stressing rates (which account for fault interaction), and coseismic models of the impact of recent nearby earthquakes. The evolved tractions differ significantly from the resolved regional tractions, with the largest dextral traction located within the restraining bend comprising the pass, which has not had recent earthquakes, rather than outside of the bend, which is more preferentially oriented under tectonic loading. Evolved fault tractions can provide more accurate initial conditions for dynamic rupture models within regions of complex fault geometry, such as the San Gorgonio Pass region. An analysis of the time needed to accumulate shear tractions that exceed typical earthquake stress drops shows that present-day tractions already exceed 3 MPa along portions of the Banning, Garnet Hill, and Mission Creek strands of the San Andreas fault. This result highlights areas that may be near failure if accumulated tractions equivalent to typical earthquake stress drops precipitate failure.
机译：可以从三维前向地壳变形模型提供的强调率估计沿San Gorgonio通行区域（南加州，美国）的现今剪切诉讼。由于模型内的故障相互作用，San Andreas和San Jacinto断层上的Dextral剪切压力率与区域负载分解的速率不同。特别是，两个故障上具有相似取向和深度的故障贴片显示出不同的强调速率。我们使用上次地震以来的时间来估计本日，沿着SAN GORGONIO通行区域的故障进化故障诉讼，故障强调率（占故障相互作用）和近期附近地震影响的电影学模型。进化的牵引力与分辨的区域诉讼有显着差异，具有位于抑制弯曲内的最大右侧牵引，该围绕包括近期地震的通过而不是弯曲的外部，这更优先于构造载荷下更优先取向。进化的故障诉讼可以为复杂断层几何区域内的动态破裂模型提供更准确的初始条件，例如San Gorgonio通行区域。累积超过典型地震应力下降的剪切诉讼所需的时间分析表明，本日诉讼沿着圣安德烈亚斯故障的禁止，石榴石山和Mission Creek Strands部分超过3MPa。如果累积的诉讼相当于典型的地震应力下降失败，则该结果突出显示可能接近故障的区域。

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