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DOI	10.1038/s41561-022-01093-z
	Fault strength and rupture process controlled by fault surface topography
	Xu, Shiqing; Fukuyama, Eiichi; Yamashita, Futoshi; Kawakata, Hironori; Mizoguchi, Kazuo; Takizawa, Shigeru
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	94
结束页码	+
卷号	16 期号:1 页码:21
英文摘要	Faults are rarely completely smooth, with topographic undulations coming from the distribution of asperities along the fault surface. Understanding the effects of fault surface topography on fault strength and earthquake source properties has been limited due to a lack of in situ observations in the field. Here we use simulated earthquake cycles on metre-scale laboratory faults to show the effects of the degree of fault topographic heterogeneity, especially on macroscopic peak strength represented by the shear force required to commence macroscopic failure. Our results demonstrate that the less heterogeneous fault is weaker, due to its lower macroscopic peak strength, and produces a larger stress drop on average than the more heterogeneous fault. Rupture along the less heterogeneous fault tends to propagate at subshear speed while the more heterogeneous fault accommodates a wider range of rupture speeds, including slow slip and supershear rupture. These results reveal how fault topographic heterogeneity affects macroscopic peak strength at rupture initiation and stress drop during rupture propagation, which has important implications for understanding natural faults and earthquakes.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000906626300001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272466
作者单位	Southern University of Science & Technology; National Research Institute for Earth Science & Disaster Resilience; Kyoto University; Ritsumeikan University; Central Research Institute of Electric Power Industry - Japan
推荐引用方式 GB/T 7714	Xu, Shiqing,Fukuyama, Eiichi,Yamashita, Futoshi,et al. Fault strength and rupture process controlled by fault surface topography[J],2023,16(1):21.
APA	Xu, Shiqing,Fukuyama, Eiichi,Yamashita, Futoshi,Kawakata, Hironori,Mizoguchi, Kazuo,&Takizawa, Shigeru.(2023).Fault strength and rupture process controlled by fault surface topography.NATURE GEOSCIENCE,16(1),21.
MLA	Xu, Shiqing,et al."Fault strength and rupture process controlled by fault surface topography".NATURE GEOSCIENCE 16.1(2023):21.