scholarly journals A new earthquake model may explain discrepancies in San Andreas fault slip

Eos ◽  
2014 ◽  
Vol 95 (35) ◽  
pp. 324-324
Author(s):  
Colin Schultz
Keyword(s):  
San Andreas Fault ◽  
Fault Slip ◽  
San Andreas ◽  
Earthquake Model

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 Reproducibility of San Andreas Fault Slip Rate Measurements at Wallace Creek in the Carrizo Plain, CA

2019 ◽  
Vol 6 (1) ◽  
pp. 156-165 ◽  
Author(s):  
Lisa Grant Ludwig ◽  
Sinan O. Akciz ◽  
J Ramon Arrowsmith ◽  
J. Barrett Salisbury
Keyword(s):  
San Andreas Fault ◽  
Slip Rate ◽  
Fault Slip ◽  
San Andreas ◽  
Fault Slip Rate

scholarly journals Variability of fault slip behavior along the San Andreas Fault in the San Juan Bautista Region

2014 ◽  
Vol 119 (12) ◽  
pp. 8827-8844 ◽  
Author(s):  
Taka'aki Taira ◽  
Roland Bürgmann ◽  
Robert M. Nadeau ◽  
Douglas S. Dreger
Keyword(s):  
San Andreas Fault ◽  
Fault Slip ◽  
San Juan ◽  
San Andreas ◽  
San Juan Bautista

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

2020 ◽  
Author(s):  
K.A. Guns ◽  
et al.
Keyword(s):  
San Andreas Fault ◽  
Strike Slip ◽  
Fault Slip ◽  
Full Model ◽  
Slip Rates ◽  
San Andreas ◽  
Fault Slip Rates ◽  
Gps Velocities

<div>Includes tables of statistical details regarding estimation of GPS velocities (including the map position and names of all campaign and continuous station sites) and the full model assessments of fit. Also includes figures that present details of all strike-slip and dip-slip fault-slip rates calculated within models.<br></div>

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

2020 ◽  
Author(s):  
K.A. Guns ◽  
et al.
Keyword(s):  
San Andreas Fault ◽  
Strike Slip ◽  
Fault Slip ◽  
Full Model ◽  
Slip Rates ◽  
San Andreas ◽  
Fault Slip Rates ◽  
Gps Velocities

<div>Includes tables of statistical details regarding estimation of GPS velocities (including the map position and names of all campaign and continuous station sites) and the full model assessments of fit. Also includes figures that present details of all strike-slip and dip-slip fault-slip rates calculated within models.<br></div>

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