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DOI	10.1016/j.epsl.2020.116696
	Origin of the shallow slip deficit on a strike slip fault: Influence of elastic structure, topography, data coverage, and noise
	Marchandon M.; Hollingsworth J.; Radiguet M.
发表日期	2021
ISSN	0012821X
卷号	554
英文摘要	Numerous fault slip models for several large strike-slip earthquakes indicate a reduction of slip along the uppermost part of the fault (Shallow Slip Deficit, SSD). In this paper, we investigate the possibility that the SSD is an artifact due to the simplifications made when we model the medium. Using a set of synthetic data for the 1992 Landers earthquake, we show that while neglecting the topography of the Landers area has a moderate impact on the retrieved slip model, neglecting variations in elastic properties, in particular the variation with depth, leads to significant bias on the slip model and can produce 25% of artificial SSD (whereas neglecting the fault damage zone has a smaller impact). We further show that a lack of data coverage around the fault further increases the amount of artificial SSD. Moreover, we find that correlated data noise with maximum amplitude as low as 5% of the maximum surface displacement can also produce significant artificial SSD. We conclude that simple elastic forward modeling in a homogeneous medium may be inappropriate for resolving slip-variability with depth, even in areas of limited topography or lateral variation in elastic properties. Finally, we argue that the estimation of model uncertainty due to data error should be systematic in inversion studies to avoid any misinterpretation of the slip distribution. © 2020 Elsevier B.V.
关键词	elastic properties fault slip inversion Pylith shallow slip deficit strike-slip earthquake topography
英文关键词	Capillary flow; Earthquakes; Elasticity; Strike-slip faults; Structural geology; Topography; Uncertainty analysis; Elastic properties; Elastic structures; Homogeneous medium; Lateral variations; Model uncertainties; Slip distribution; Strike-slip earthquakes; Surface displacement; Fault slips; data inversion; elastic property; fault slip; finite element method; Landers earthquake 1992; seismic noise; strike-slip fault; topographic effect; California; Landers; United States
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203211
作者单位	Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, 38000, France
推荐引用方式 GB/T 7714	Marchandon M.,Hollingsworth J.,Radiguet M.. Origin of the shallow slip deficit on a strike slip fault: Influence of elastic structure, topography, data coverage, and noise[J],2021,554.
APA	Marchandon M.,Hollingsworth J.,&Radiguet M..(2021).Origin of the shallow slip deficit on a strike slip fault: Influence of elastic structure, topography, data coverage, and noise.Earth and Planetary Science Letters,554.
MLA	Marchandon M.,et al."Origin of the shallow slip deficit on a strike slip fault: Influence of elastic structure, topography, data coverage, and noise".Earth and Planetary Science Letters 554(2021).