气候变化领域集成服务门户(CCPortal): Accrual of widespread rock damage from the 2019 Ridgecrest earthquakes

CCPortal

DOI	10.1038/s41561-021-00888-w
	Accrual of widespread rock damage from the 2019 Ridgecrest earthquakes
	Padilla, Alba M. Rodriguez; Oskin, Michael E.; Milliner, Christopher W. D.; Plesch, Andreas
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	222
结束页码	+
卷号	15 期号:3 页码:13
英文摘要	Fracture density decays continuously with distance from the fault resulting in regionally widespread damage over multiple earthquake cycles, according to combined maps of fracture, strain and aftershocks from the 2019 Ridgecrest earthquakes. Inelastic processes from earthquakes contribute to the formation of fault damage zones that constitute a permanent sink of strain energy, modify the elastic properties of the shallow crust and amplify near-field ground shaking. Constraints on the extent of inelastic deformation differ depending on the dataset and methodology used. Here we combine fracture, strain and aftershock maps from the 2019 Ridgecrest earthquakes to reconcile the properties of damage zones across different spatial scales and resolutions. The decay of inelastic deformation with distance from the fault is well described by an inverse power law, extends beyond 20 km from the faults and is insensitive to lithology and slip magnitude. The damage decay is continuous without breaks in scaling, suggesting that a single mechanism dominates yielding. On the basis of our fracture density distribution, we predict an average reduction in shear rigidity of about 20% in bedrock and 40% in alluvium immediately adjacent to the fault, declining to less than 1% at 100 m. Our observations reveal how macroscopic fracturing generates intense near-fault damage and that widespread damage accrues regionally over multiple earthquake cycles.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000761836900004
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/272469
作者单位	University of California System; University of California Davis; California Institute of Technology; Harvard University
推荐引用方式 GB/T 7714	Padilla, Alba M. Rodriguez,Oskin, Michael E.,Milliner, Christopher W. D.,et al. Accrual of widespread rock damage from the 2019 Ridgecrest earthquakes[J],2022,15(3):13.
APA	Padilla, Alba M. Rodriguez,Oskin, Michael E.,Milliner, Christopher W. D.,&Plesch, Andreas.(2022).Accrual of widespread rock damage from the 2019 Ridgecrest earthquakes.NATURE GEOSCIENCE,15(3),13.
MLA	Padilla, Alba M. Rodriguez,et al."Accrual of widespread rock damage from the 2019 Ridgecrest earthquakes".NATURE GEOSCIENCE 15.3(2022):13.