资源环境科技发展态势分析平台

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‐yr 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/yr along the creeping fault ends to over 30‐mm/yr along much of the central 100‐km of the fault. Creep rates are 3‐8‐mm/yr 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.