Dynamic rupture models of earthquakes on the Bartlett Springs Fault, Northern California
Dynamic rupture models of earthquakes on the Bartlett Springs Fault, Northern California
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DOI：
10.1002/2015gl063802
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发表时间：
2014-12
影响因子：
5.2
通讯作者：
J. Lozos;R. Harris;J. Murray;J. Lienkaemper
中科院分区：
文献类型：
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作者：
J. Lozos;R. Harris;J. Murray;J. Lienkaemper
巴特利特泉断层（BSF）是圣安德烈亚斯断层系统北方最东端的分支，它沿着大部分的长度蠕动。BSF的大地测量数据是稀疏的，并且表面蠕变速率通常受到很差的约束。现有的两个大地滑动率反演解决至少一个锁定补丁内的蠕动区。我们使用三维有限元程序FaultMod进行基于大地测量反演的动态破裂模型，以确定破裂传播到蠕变区域的能力，以及评估BSF破裂的可能量级。对于这两套模型，我们发现，地震蠕变的分布限制了同震破裂的程度，由于锁定和蠕变区域之间的摩擦性能的对比。
The Bartlett Springs Fault (BSF), the easternmost branch of the northern San Andreas Fault system, creeps along much of its length. Geodetic data for the BSF are sparse, and surface creep rates are generally poorly constrained. The two existing geodetic slip rate inversions resolve at least one locked patch within the creeping zones. We use the 3‐D finite element code FaultMod to conduct dynamic rupture models based on both geodetic inversions, in order to determine the ability of rupture to propagate into the creeping regions, as well as to assess possible magnitudes for BSF ruptures. For both sets of models, we find that the distribution of aseismic creep limits the extent of coseismic rupture, due to the contrast in frictional properties between the locked and creeping regions.