Global Positioning System constraints on fault slip rates in southern California and northern Baja, Mexico

1996 ◽  
Vol 101 (B10) ◽  
pp. 21943-21960 ◽  
Author(s):  
Richard A. Bennett ◽  
William Rodi ◽  
Robert E. Reilinger
Keyword(s):  
Global Positioning System ◽  
Southern California ◽  
Fault Slip ◽  
Positioning System ◽  
Slip Rates ◽  
Fault Slip Rates ◽  
Global Positioning

Velocity field in Asia inferred from Quaternary fault slip rates and Global Positioning System observations

2000 ◽  
Vol 105 (B8) ◽  
pp. 19185-19209 ◽  
Author(s):  
W. E. Holt ◽  
N. Chamot-Rooke ◽  
X. Le Pichon ◽  
A. J. Haines ◽  
B. Shen-Tu ◽  
...  
Keyword(s):  
Velocity Field ◽  
Global Positioning System ◽  
Fault Slip ◽  
Positioning System ◽  
Slip Rates ◽  
Fault Slip Rates ◽  
Global Positioning

scholarly journals Global Positioning System constraints on fault slip rates in the Death Valley Region, California and Nevada

1997 ◽  
Vol 24 (23) ◽  
pp. 3073-3076 ◽  
Author(s):  
R. A. Bennett ◽  
B. P. Wernicke ◽  
J. L. Davis ◽  
P. Elósegui ◽  
J. K. Snow ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Fault Slip ◽  
Death Valley ◽  
Positioning System ◽  
Slip Rates ◽  
Fault Slip Rates ◽  
Global Positioning

scholarly journals New geodetic constraints on southern San Andreas fault-slip rates, San Gorgonio Pass, California

Geosphere ◽  
2020 ◽  
Author(s):  
Katherine A. Guns ◽  
Richard A Bennett ◽  
Joshua C. Spinler ◽  
Sally F. McGill
Keyword(s):  
Velocity Field ◽  
Southern California ◽  
San Andreas Fault ◽  
Plate Boundary ◽  
Slip Rate ◽  
Fault Slip ◽  
Slip Rates ◽  
San Andreas ◽  
Fault Slip Rates ◽  
Gps Velocity Field

Assessing fault-slip rates in diffuse plate boundary systems such as the San Andreas fault in southern California is critical both to characterize seis­mic hazards and to understand how different fault strands work together to accommodate plate boundary motion. In places such as San Gorgonio Pass, the geometric complexity of numerous fault strands interacting in a small area adds an extra obstacle to understanding the rupture potential and behavior of each individual fault. To better understand partitioning of fault-slip rates in this region, we build a new set of elastic fault-block models that test 16 different model fault geometries for the area. These models build on previ­ous studies by incorporating updated campaign GPS measurements from the San Bernardino Mountains and Eastern Transverse Ranges into a newly calculated GPS velocity field that has been removed of long- and short-term postseismic displacements from 12 past large-magnitude earthquakes to estimate model fault-slip rates. Using this postseismic-reduced GPS velocity field produces a best- fitting model geometry that resolves the long-standing geologic-geodetic slip-rate discrepancy in the Eastern California shear zone when off-fault deformation is taken into account, yielding a summed slip rate of 7.2 ± 2.8 mm/yr. Our models indicate that two active strands of the San Andreas system in San Gorgonio Pass are needed to produce sufficiently low geodetic dextral slip rates to match geologic observations. Lastly, results suggest that postseismic deformation may have more of a role to play in affecting the loading of faults in southern California than previously thought.

scholarly journals Global positioning system resurvey of Southern California Seismic Network stations

1995 ◽  
Vol 85 (1) ◽  
pp. 361-374
Author(s):  
Jennifer S. Haase ◽  
Egill Hauksson ◽  
Hiroo Kanamori ◽  
Jim Mori
Keyword(s):  
Global Positioning System ◽  
Southern California ◽  
Seismic Station ◽  
Seismic Network ◽  
Positioning System ◽  
Dual Frequency ◽  
Time Data ◽  
Phase Measurements ◽  
Station Coordinates ◽  
Global Positioning

Abstract Systematic errors in travel-time data from local earthquakes can sometimes be traced to inaccuracies in the published seismic station coordinates. This prompted a resurvey of the stations of the Caltech/USGS Southern California Seismic Network (SCSN) using the Global Positioning System (GPS). We surveyed 241 stations of the SCSN using Trimble and Ashtech dual-frequency GPS receivers and calculated positions accurate to 3 m using differential positioning from carrier phase measurements. Twelve percent of the stations that were surveyed were found to be mislocated by more than 500 m. Stations of the TERRAscope and USC networks were also surveyed, as well as a network of portable seismic stations deployed shortly after the 1992 Joshua Tree and Landers earthquakes. The new coordinates and the offsets from the old coordinates are given below. The new coordinates are being used in SCSN locations as of 1 January 1994.

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