气候变化领域集成服务门户(CCPortal): Distribution of Aseismic Deformation Along the Central San Andreas and Calaveras Faults From Differencing Repeat Airborne Lidar

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DOI	10.1029/2020GL090628
	Distribution of Aseismic Deformation Along the Central San Andreas and Calaveras Faults From Differencing Repeat Airborne Lidar
	Scott C.P.; DeLong S.B.; Arrowsmith J.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	Fault creep reduces seismic hazard and serves as a window into plate boundary processes; however, creep rates are typically constrained with sparse measurements. We use differential lidar topography (11–13 year time span) to measure a spatially dense surface deformation field along a 150 km section of the Central San Andreas and Calaveras faults. We use an optimized windowed-iterative-closest-point approach to resolve independent creep rates every 400 m at 1–2 km apertures. Rates vary from <10 mm/year along the creeping fault ends to over 30 mm/year along much of the central 100 km of the fault. Creep rates are 3–8 mm/year higher than most rates from alignment arrays and creepmeters, likely due to the larger aperture of the topographic differencing. Creep is often focused along discrete fault traces, but strain is sometimes distributed in areas of complex fault geometry, such as Mustang Ridge. Our observations constrain shallow seismic moment accumulation and the location of the creeping fault trace. ©2020. The Authors.
英文关键词	Optical radar; Seismology; Topography; Airborne LiDAR; Complex faults; Creeping faults; Discrete Faults; Iterative Closest Points; Plate boundaries; Seismic hazards; Shallow seismic; Creep; airborne sensing; creep; deformation mechanism; fault zone; lidar; seismic hazard; seismic moment; spatial variation; topographic mapping; California; San Andreas; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169459
作者单位	School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; U.S. Geological Survey, Moffett Field, CA, United States
推荐引用方式 GB/T 7714	Scott C.P.,DeLong S.B.,Arrowsmith J.R.. Distribution of Aseismic Deformation Along the Central San Andreas and Calaveras Faults From Differencing Repeat Airborne Lidar[J],2020,47(22).
APA	Scott C.P.,DeLong S.B.,&Arrowsmith J.R..(2020).Distribution of Aseismic Deformation Along the Central San Andreas and Calaveras Faults From Differencing Repeat Airborne Lidar.Geophysical Research Letters,47(22).
MLA	Scott C.P.,et al."Distribution of Aseismic Deformation Along the Central San Andreas and Calaveras Faults From Differencing Repeat Airborne Lidar".Geophysical Research Letters 47.22(2020).