Arid
DOI10.1016/j.epsl.2013.11.043
How well do surface slip measurements track slip at depth in large strike-slip earthquakes? The importance of fault structural maturity in controlling on-fault slip versus off-fault surface deformation
Dolan, James F.; Haravitch, Ben D.
通讯作者Dolan, James F.
来源期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
EISSN1385-013X
出版年2014
卷号388页码:38-47
英文摘要

Comparisons of observed surface displacements with geodetically inferred slip at depth in six large (Mw >= 7.1) strike-slip earthquakes reveal a correlation between the structural maturity of the fault and the ratio of deep slip to surface slip that occurs on localized zones of surface rupture. Specifically, structurally immature faults (<= 25 km of total displacement) manifest only similar to 50-60% of total slip on narrow fault surface traces versus similar to 85-95% for structurally mature faults (>= 85 km total slip). The same pattern holds when structurally simple parts of a surface rupture are analyzed separately from parts that exhibit obvious structural complexity (e.g., discontinuous or multiple traces or significant dip slip). These results imply that geologic measurements of surface slip along structurally immature faults are likely to significantly underestimate the true slip at depth in large earthquakes. This observation has implications for a number of important problems, including determination of fault slip rates, which are based on surface offsets; earthquake probability assessments, which are based on geologic fault slip rates; comparisons of geologic and geodetic rate data in the search for strain transients; the structural evolution of fault zones; estimation of paleo-earthquake magnitudes based on geomorphic offsets; analyses of the relative importance of faulting vs. distributed deformation in accommodating relative plate motions in continental crust; the design and construction of infrastructure built near active faults; and possibly for the prediction of strong ground motions, which may at least partially depend on the degree of slip localization to the surface. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.


英文关键词fault slip rates strain localization comparison of geologic and geodetic rate data strain transient structural evolution of faults probabilistic seismic hazard assessment
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000331502600005
WOS关键词NORTH ANATOLIAN FAULT ; TRANSIENT STRAIN ACCUMULATION ; CALIFORNIA SHEAR ZONE ; 1999 HECTOR MINE ; DENALI-FAULT ; ASYMMETRIC DAMAGE ; GROUND MOTION ; MOJAVE DESERT ; RUPTURE ; TURKEY
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/181575
作者单位Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA
推荐引用方式
GB/T 7714
Dolan, James F.,Haravitch, Ben D.. How well do surface slip measurements track slip at depth in large strike-slip earthquakes? The importance of fault structural maturity in controlling on-fault slip versus off-fault surface deformation[J],2014,388:38-47.
APA Dolan, James F.,&Haravitch, Ben D..(2014).How well do surface slip measurements track slip at depth in large strike-slip earthquakes? The importance of fault structural maturity in controlling on-fault slip versus off-fault surface deformation.EARTH AND PLANETARY SCIENCE LETTERS,388,38-47.
MLA Dolan, James F.,et al."How well do surface slip measurements track slip at depth in large strike-slip earthquakes? The importance of fault structural maturity in controlling on-fault slip versus off-fault surface deformation".EARTH AND PLANETARY SCIENCE LETTERS 388(2014):38-47.
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