A strike-slip fault in a laterally inhomogeneous medium

Rybicki, Kacper R.; Kasahara, Keichi

doi:10.1016/0040-1951(77)90164-0

Cited by 40 publications

(24 citation statements)

References 13 publications

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“…The difference between the homogeneous and inhomogeneous models will be most pronounced very close to the fault. When compared to a homogeneous elastic half-space model, an elastic model with a compliant zone surrounding the fault predicts very similar (slightly smaller) strains in the far field, but substantially higher strains near the fault (McHugh and Johnston, 1977;Rybicki and Kasahara, 1977).…”

Section: D Inhomogeneous Modelmentioning

confidence: 87%

“…Lisowski et al (1991) presented a lateral inhomogeneous model with a narrow zone of compliant material near a fault to explain the abrupt inflection in the velocity profile at Point Reyes. In general, if a fault is embedded in a compliant (lower rigidity) zone, the use of a simple homogeneous elastic half-space model results in an underestimate of the locking depth (McHugh and Johnston, 1977;Rybicki and Kasahara, 1977). The difference between the homogeneous and inhomogeneous models will be most pronounced very close to the fault.…”

Section: D Inhomogeneous Modelmentioning

confidence: 95%

“…Lisowski et al (1991) suggested that the steep velocity gradient and pronounced asymmetry in velocities across the fault at Point Reyes can be explained by a model with differing elastic properties on either side of the SAF. A low modulus zone centered on the fault concentrates strain near the fault (Rybicki and Kasahara, 1977).…”

Section: Past Nonuniform Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Geodetic Evidence for a Near-Fault Compliant Zone along the San Andreas Fault in the San Francisco Bay Area

Chen

Freymueller

2002

Bulletin of the Seismological Society of America

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Global Positioning System measurements in 1996 and 1997 and Electronic Distance Measuring data from the 1970s and 1980s at sites in five smallaperture geodetic networks along the San Andreas fault in northern California were used to determine the near-fault strain rate. The tensor shear strain rate 12 (referreḋ e to a coordinate system with the 1 axis parallel to the fault and the 2 axis normal to the fault) in the Bodega-Tomales, Lake San Andreas, and Black Mountain-Radio Facility networks (from north to south) are 0.339 ‫ע‬ 0.025, 0.366 ‫ע‬ 0.095, and 0.316 ‫ע‬ 0.060 lstrain/yr, respectively. The shear strain rate near the fault in the Black Mountain-Radio Facility and Lake San Andreas networks can be explained either by a 2D inhomogeneous model in which a low-rigidity compliant zone concentrates strain near the fault or by a very shallow locking depth of 8 km. Other evidence points to a locking depth greater than 10 km, so we prefer the first explanation. The contrast in rigidity between the fault zone and the surrounding rock appears to become stronger to the south, starting at approximately the northern extent of the Salinian block at Bodega Bay, suggesting that both the materials on either side of the fault and the cumulative fault offset play a role in the development of a compliant fault zone. Estimates of fault slip rates from far field geodetic data are only weakly sensitive to the presence of a compliant zone, but estimates of locking depths can be biased by approximately 10% toward shallower values if a compliant zone is present and unmodeled.

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Section: D Inhomogeneous Modelmentioning

confidence: 87%

Section: D Inhomogeneous Modelmentioning

confidence: 95%

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Geodetic Evidence for a Near-Fault Compliant Zone along the San Andreas Fault in the San Francisco Bay Area

Chen

Freymueller

2002

Bulletin of the Seismological Society of America

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“…We suggest that when interpreting observed seismic waves it is important to consider effects arising from material heterogeneity in the source region. Similar recommendations regarding the analysis of static deformation fields are given by Rybicki & Kasahara (1977), Mahrer & Nur (1979), Mahrer (1981) and others.…”

Section: Introductionmentioning

confidence: 82%

The response of two joined quarter spaces toSHline sources located at the material discontinuity interface

Ben‐Zion

1989

Geophysical Journal International

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Exact analytical solutions to problems of SH line force and line dislocation operating at the interface between two quarter spaces are derived and discussed. It is shown that the resulting fields differ from that of a homogeneous half space in the distribution of travel times, wave amplitudes and polarity of first motions. These effects are documented in the literature. It is, therefore, suggested that when constructing theoretical seismic displacement fields from source, path and site effects, it is important to use response functions that account for material heterogeneity in the source region. An extension of the formulation used in the case of SH line dislocation leads to a 3-D representation theorem which gives the displacement field in terms of the displacement discontinuities along the rupture area. The resulting overall sue scaling parameter is the 'potency', which does not suffer from an ambiguity associated with seismic moment in the case of heterogeneous source region.

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“…Sato (1971) and Sato and Yamashita (1975) derived the expressions for the static surface deformations due to two-dimensional strike slip and dip-slip faults located along the dipping boundary between the two different media. McHugh and Johnston (1977) and Rybicki and Kasahara (1977) studied the static deformation of a laterally inhomogeneous medium by a two-dimensional strike-slip fault. Rybicki (1978) derived the formulae for the displacement, strain and stress fields of a twodimensional strike-slip fault in a laterally inhomogeneous half-space.…”

Section: Introductionmentioning

confidence: 99%

Deformation of a Uniform Half-Space with Rigid Boundary Due to a Strike-Slip Line Source

Malik¹

2013

IOSR-JM

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A strike-slip fault in a laterally inhomogeneous medium

Cited by 40 publications

References 13 publications

Geodetic Evidence for a Near-Fault Compliant Zone along the San Andreas Fault in the San Francisco Bay Area

Geodetic Evidence for a Near-Fault Compliant Zone along the San Andreas Fault in the San Francisco Bay Area

The response of two joined quarter spaces toSHline sources located at the material discontinuity interface

Deformation of a Uniform Half-Space with Rigid Boundary Due to a Strike-Slip Line Source

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