Spatio‐Temporal Clustering of Seismicity Enabled by Off‐Fault Plasticity
Spatio‐Temporal Clustering of Seismicity Enabled by Off‐Fault Plasticity
复制标题
断层可塑性引起的地震活动的时空聚集
DOI:
10.1029/2021gl097601
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发表时间:
2022
影响因子:
5.2
通讯作者:
Elbanna, Ahmed E.
中科院分区:
文献类型:
--
作者:
Mia, Md Shumon;Abdelmeguid, Mohamed;Elbanna, Ahmed E.
While significant progress has been made in understanding earthquake source processes in linear elastic domains, the effect of more realistic rheologies including plasticity is poorly understood. Here, we simulate the sequence of earthquake and aseismic slip of a 2D antiplane rate‐and‐state fault embedded in a full‐space elastic‐plastic bulk. We show that off‐fault plasticity may lead to partial ruptures as well as temporal clustering of seismic events. Furthermore, the interaction of fault slip and off‐fault plasticity results in pockets of slip deficit. While the energy dissipated through plastic deformation remains a small fraction of the total energy budget, its impact on the source characteristics is disproportionally large through the redistribution of stresses and viscous relaxation. Our results suggest a new mechanism of dynamic heterogeneity in earthquake physics that may have important implications on earthquake size distribution and energy budget.
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影响因子:
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通讯作者:
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DOI:
10.1111/j.1365-246x.2008.03736.x
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期刊:
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10.1029/2020jb019587
发表时间:
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期刊:
Journal of Geophysical Research: Solid Earth
影响因子:
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作者:
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通讯作者:
Kaneko, Yoshihiro