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Global positioning system reoccupation of early triangulation sites - Tectonic deformation of the Southern Coast RangesWe study tectonic deformation in the Southern Coast Range, California. We use triangulation and astronomic azimuth data collected since 1875, trilateration since 1970, and global positioning system data collected from 1986 to 1987. Two modeling techniques have been used. An elastic block-fault model is applied to study the tectonic motion of the San Andreas Fault and the San Gregorio-Hosgri Fault. Station velocities are modeled to study regional deformations. Results show that the regional deformation is predominantly controlled by deep strike-slip motion along the San Andreas Fault, at a rate of 33 +/- 2 mm/yr. Deep slip along the San Gregorio-Hosgri Fault is about 0-4 mm/yr, assuming a locked suit to a depth of 20 km. Convergence normal to the San Andreas Fault in the Southern Coast Ranges is not greater than 0.02 microrad/yr.
Document ID
19930062058
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Shen, Zheng-Kang
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Jackson, David D.
(California Univ. Los Angeles, United States)
Date Acquired
August 16, 2013
Publication Date
June 10, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: B6
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A46055
Funding Number(s)
CONTRACT_GRANT: NSF EAR-86-18393
CONTRACT_GRANT: NAG5-447
Distribution Limits
Public
Copyright
Other

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