气候变化领域集成服务门户(CCPortal): Heterogeneous Power-Law Flow With Transient Creep in Southern California Following the 2010 El Mayor-Cucapah Earthquake

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DOI	10.1029/2020JB019740
	Heterogeneous Power-Law Flow With Transient Creep in Southern California Following the 2010 El Mayor-Cucapah Earthquake
	Tang C.-H.; Barbot S.; Hsu Y.-J.; Wu Y.-M.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	The rheology of the crust and mantle and the interaction of viscoelastic flow with seismic/aseismic slip on faults control the state of stress in the lithosphere over multiple seismic cycles. The rheological behavior of rocks is well constrained in a laboratory setting, but the in situ properties of the lithosphere and its lateral variations remain poorly known. Here, we access the lower-crustal rheology in Southern California by exploiting 8 years of geodetic postseismic deformation following the 2010 El Mayor-Cucapah earthquake. The data illuminate viscoelastic flow in the lower crust with lateral variations of effective viscosity correlated with the geological province. We show that a Burgers assembly with dashpots following a nonlinear constitutive law can approximate the temporal evolution of stress and strain rate, indicating the activation of nonlinear transient creep before steady-state dislocation creep. The transient and background viscosities in the lower crust of the Salton Trough are on the order of ~1018 and ~1019 Pa s, respectively, about an order of magnitude lower than those in the surrounding regions. We highlight the importance of transient creep, nonlinear flow laws, and lateral variations of rheological properties to capture the entire history of postseismic relaxation following the El Mayor-Cucapah earthquake. ©2020. The Authors.
英文关键词	El Mayor-Cucapah earthquake; geodetic inversion; GPS; postseismic deformation; rheology; seismic cycle
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187612
作者单位	Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Department of Geosciences, National Taiwan University, Taipei, Taiwan; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Research Center for Future Earth, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Tang C.-H.,Barbot S.,Hsu Y.-J.,et al. Heterogeneous Power-Law Flow With Transient Creep in Southern California Following the 2010 El Mayor-Cucapah Earthquake[J],2020,125(9).
APA	Tang C.-H.,Barbot S.,Hsu Y.-J.,&Wu Y.-M..(2020).Heterogeneous Power-Law Flow With Transient Creep in Southern California Following the 2010 El Mayor-Cucapah Earthquake.Journal of Geophysical Research: Solid Earth,125(9).
MLA	Tang C.-H.,et al."Heterogeneous Power-Law Flow With Transient Creep in Southern California Following the 2010 El Mayor-Cucapah Earthquake".Journal of Geophysical Research: Solid Earth 125.9(2020).