Arid
DOI10.1002/2015JB011941
Recovery of secular deformation field of Mojave Shear Zone in Southern California from historical terrestrial and GPS measurements
Liu, Shaozhuo1; Shen, Zheng-Kang2,3; Buergmann, Roland4
通讯作者Shen, Zheng-Kang
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN2169-9313
EISSN2169-9356
出版年2015
卷号120期号:5页码:3965-3990
英文摘要

The 1992 M-w 7.3 Landers and 1999 M-w 7.1 Hector Mine earthquakes struck the Eastern California Shear Zone (ECSZ) in the Mojave Desert, Southern California. Coseismic and postseismic deformation from these events affect efforts to use Global Positioning System (GPS) observations collected since these events to establish a secular surface velocity field, especially in the near field of the coseismic ruptures. We devise block motion models constrained by both historical pre-Landers triangulation and trilateration observations and post-Landers GPS measurements to recover the secular deformation field and differentiate the postseismic transients in the Mojave region. Postseismic transients are found to remain in the Southern California Earthquake Center Crustal Motion Map Version 4, Plate Boundary Observatory, and Scripps Orbit and Permanent Array Center GPS velocity solutions in the form of 2-3mm/yr excess right-lateral shear across the Landers and Hector Mine coseismic ruptures. The cumulative deformation rate across the Mojave ECSZ is 13.2-14.4mm/yr, at least twice the geologic rate since the late Pleistocene (6.21.9mm/yr). Postseismic GPS time series based on our secular velocity field reveal enduring late-stage transient motions in the near field of the coseismic ruptures that provide new constraints on the rheological structure of the lower crust and upper mantle.


英文关键词Mojave East California Shear Zone secular deformation Landers and Hector Mine earthquakes postseismic deformation GPS triangulation trilateration
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000356454500058
WOS关键词SAN-ANDREAS FAULT ; 1999 HECTOR MINE ; TRANSIENT STRAIN ACCUMULATION ; EASTERN CALIFORNIA ; POSTSEISMIC DEFORMATION ; LANDERS EARTHQUAKE ; SLIP RATES ; OWENS-VALLEY ; LOWER CRUST ; BIG BEND
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构北京大学 ; University of California, Berkeley ; University of California, Los Angeles
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188723
作者单位1.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing, Peoples R China;
2.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA;
3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China;
4.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
推荐引用方式
GB/T 7714
Liu, Shaozhuo,Shen, Zheng-Kang,Buergmann, Roland. Recovery of secular deformation field of Mojave Shear Zone in Southern California from historical terrestrial and GPS measurements[J]. 北京大学, University of California, Berkeley, University of California, Los Angeles,2015,120(5):3965-3990.
APA Liu, Shaozhuo,Shen, Zheng-Kang,&Buergmann, Roland.(2015).Recovery of secular deformation field of Mojave Shear Zone in Southern California from historical terrestrial and GPS measurements.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,120(5),3965-3990.
MLA Liu, Shaozhuo,et al."Recovery of secular deformation field of Mojave Shear Zone in Southern California from historical terrestrial and GPS measurements".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120.5(2015):3965-3990.
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