Aftershocks and Pore Fluid Diffusion Following the 1992 Landers Earthquake
William J. Bosl,Amos Nur +1 more
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In this paper, the authors model the evolution of regional stress following the 1992 Landers earthquake in order to test the importance of pore fluid flow in producing aftershocks and find that regions of rising postseismic poroelastic Coulomb stress overlap considerably with regions of positive coseismic Coulomb stresses.Abstract:
[1] We model the evolution of regional stress following the 1992 Landers earthquake in order to test the importance of pore fluid flow in producing aftershocks. Rising fluid pressure due to pore fluid flow and the resulting Coulomb stress changes were found to be strongly correlated with the time and location of aftershock events. Regional aftershock frequencies computed by integrating pore pressure decay rates also agreed quite well with aftershock data. Calculations show that regions of rising postseismic poroelastic Coulomb stress overlap considerably with regions of positive coseismic Coulomb stress. Thus pore fluid flow, which affects pore pressure within faults and causes regional poroelastic stress evolution following earthquakes, gradually evolves the initial coseismic stress changes. Together these changes provide a reasonable physical mechanism for aftershock triggering which agrees with data for the 1992 Landers earthquake.read more
Citations
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Aftershocks driven by a high-pressure CO2 source at depth.
Stephen A. Miller,Cristiano Collettini,Lauro Chiaraluce,Massimo Cocco,Massimiliano Rinaldo Barchi,Boris Kaus +5 more
TL;DR: It is proposed that aftershocks of large earthquakes in such geologic environments may be driven by the coseismic release of trapped, high-pressure fluids propagating through damaged zones created by the mainshock, which may provide a link between earthquakes, aftershock, crust/mantle degassing and earthquake-triggered large-scale fluid flow.
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Introduction to special section: Stress transfer, earthquake triggering, and time‐dependent seismic hazard
TL;DR: A review of the recent work related to stress transfer, earthquake triggering, and time-dependent seismic hazard can be found in this paper, where the authors focus on their understanding of stress transfer at various temporal and spatial scales.
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Seismogenic permeability, ks
TL;DR: In this article, the authors determined the hydraulic diffusivity value of fractures associated with induced seismicity to lie between 0.1 and 10 m2/s, which corresponds to a range of intrinsic permeability values between 5 × 10−16 and 5× 10−14 m2.
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Modeling afterslip and aftershocks following the 1992 Landers earthquake
TL;DR: In this article, the authors model the postseismic response of a fault zone that is assumed to obey a rate-strengthening rheology, where the frictional stress varies as aσ ln(e), e being the deformation rate and aσ > 0 a rheological parameter.
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Implications of deformation following the 2002 Denali, Alaska, earthquake for postseismic relaxation processes and lithospheric rheology
Andrew M. Freed,Roland Bürgmann,Eric Calais,Jeffrey T. Freymueller,Sigrún Hreinsdóttir,Sigrún Hreinsdóttir +5 more
TL;DR: In this paper, the authors use 3-D viscoelastic finite element models to infer the mechanisms responsible for postseismic observations from a large array of Global Positioning System (GPS) receivers.
References
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Book
The Mechanics of Earthquakes and Faulting
TL;DR: The connection between faults and the seismicity generated is governed by the rate and state dependent friction laws -producing distinctive seismic styles of faulting and a gamut of earthquake phenomena including aftershocks, afterslip, earthquake triggering, and slow slip events.
Journal ArticleDOI
Static stress changes and the triggering of earthquakes
TL;DR: In this article, a Coulomb failure criterion was proposed for the production of aftershocks, where faults most likely to slip are those optimally orientated for failure as a result of the prevailing regional stress field and the stress change caused by the mainshock.
MonographDOI
The Rock Physics Handbook
TL;DR: The third edition of the reference book as discussed by the authors has been thoroughly updated while retaining its comprehensive coverage of the fundamental theory, concepts, and laboratory results, and highlights applications in unconventional reservoirs, including water, hydrocarbons, gases, minerals, rocks, ice, magma and methane hydrates.
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A constitutive law for rate of earthquake production and its application to earthquake clustering
TL;DR: In this article, the authors proposed a state-variable constitutive formulation for the rate of earthquake production resulting from an applied stressing history, which was implemented using solutions for nucleation of unstable fault slip on faults with experimentally derived rate and state dependent fault properties.
Journal ArticleDOI
Introduction to Special Section: Stress Triggers, Stress Shadows, and Implications for Seismic Hazard
TL;DR: This paper reviewed many published works and presented a compilation of quantitative earthquake interaction studies from a stress change perspective, which provided some clues about certain aspects of earthquake mechanics, but much work remains before we can understand the complete story of how earthquakes work.