Fluid mass sources and point forces in linear elastic diffusive solids

Rudnicki, John W.

doi:10.1016/0167-6636(86)90042-6

Cited by 149 publications

(135 citation statements)

References 11 publications

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“…The process of fluid pressure relaxation can be approximately characterized by a system of equations describing the dynamics of fluid saturated porous elastic solid [Biot, 1962]. A diffusion equation describing the evolution of fluid mass alteration per unit volume, m, can be uncoupled [Rudnicki, 1986;PHASE Research Project, 2005] …”

Section: Seismicity Modelmentioning

confidence: 99%

Evidence for rainfall‐triggered earthquake activity

Hainzl

Kraft

Wassermann

et al. 2006

Geophysical Research Letters

206

173

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[1] Fluids are known to be of major importance for the earthquake generation because pore pressure variations alter the strength of faults. Thus they can initiate earthquakes if the crust is close enough to its critical state. Based on the observations of the isolated seismicity below the densely monitored Mt. Hochstaufen, SE Germany, we are now able to demonstrate that the crust can be so close-to-failure that even tiny pressure variations associated with precipitation can trigger earthquakes in a few kilometer depth. We find that the recorded seismicity is highly correlated with the calculated spatiotemporal pore pressure changes due to diffusing rain water and in good agreement with the response of faults described by the rate-state friction law.

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Section: Seismicity Modelmentioning

confidence: 99%

Evidence for rainfall‐triggered earthquake activity

Hainzl

Kraft

Wassermann

et al. 2006

Geophysical Research Letters

206

173

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“…Dr. Hans-J. Kumpel from Germany informed the author about the early instructive paper by Verruijt and These agree with the known formulae (Cleary , 1977;Rudnicki, 1986).…”

Section: Discussionmentioning

confidence: 54%

Fluid Pressure Responses of a Water-Saturated Porous Elastic Multi-Layered Half-Space to Water Pumping and Atmospheric Loading.

Maruyama

1994

J,Phys,Earth

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“…0 (R is the distance to the center of dilation); in the case of the undrained deformation, they can be obtained by comparing C/R 2 to the poroelastic solution for the instantaneous mass source in the full space [Rudnicki, 1986].…”

Section: Spatial Weightingmentioning

confidence: 99%

Using in situ vertical displacements to characterize changes in moisture load

Murdoch

Freeman

Germanovich

et al. 2015

Water Resources Research

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Changes in soil moisture content alter the load on underlying material, and we have developed a technique for characterizing this effect by using an extensometer to measure the displacement caused by the load change. The extensometer is pushed into soil at depths of 5 m or more, and displacement between two anchors separated by 1.5 m is measured with a resolution of better than 0.01 lm (10 28 m). The instrument is sensitive to load changes at the ground surface within a radial distance that is roughly twice its depth, potentially providing a method for averaging changes in water content over hundreds of m 2 or more. During a field trial at a site in South Carolina, compressive displacements in unsaturated saprolite were strongly correlated to rainfall with a calibration factor of 0.16 lm displacement per mm of rainfall 60.002 lm/mm (R 2 5 0.95). Estimates of the net change in water volume per unit area made using the calibration factor from rainfall were similar to independent estimates of evapotranspiration. The technique was affected by barometric pressure variations, but the sensitivity was less than expected and does not hinder meaningful application. A companion instrument demonstrated the displacement signal was repeatable.

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Fluid mass sources and point forces in linear elastic diffusive solids

Cited by 149 publications

References 11 publications

Evidence for rainfall‐triggered earthquake activity

Evidence for rainfall‐triggered earthquake activity

Fluid Pressure Responses of a Water-Saturated Porous Elastic Multi-Layered Half-Space to Water Pumping and Atmospheric Loading.

Using in situ vertical displacements to characterize changes in moisture load

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