Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 47, Issue 22, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2020GL090628
Keywords
San Andreas fault; fault creep; lidar; topographic differencing
Categories
Funding
- US National Science Foundation Postdoctoral Fellowship [1625221]
- School of Earth and Space Exploration, Arizona State University
- National Earthquake Hazards Reduction Program
- NASA [16-ESI16-0029]
- Directorate For Geosciences
- Division Of Earth Sciences [1625221] Funding Source: National Science Foundation
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available