Effect of Porosity and Permeability Evolution on Injection-Induced Aseismic Slip

Yang, Yuyun; Dunham, Eric M.

doi:10.1002/essoar.10504595.1

Cited by 6 publications

(11 citation statements)

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“…These observations were then accompanied by a series of numerical modeling of injection‐induced aseismic and seismic fault slip (Bhattacharya & Viesca, 2019; Cappa et al., 2019; Larochelle et al., 2021; Wynants‐Morel et al., 2020; Yang & Dunham, 2021; Zhu et al., 2020). Recently, hydromechanical modeling of fluid injection in a permeable slip‐weakening fault showed that the increase of the critical earthquake nucleation size (the minimum size of a slip zone required for self‐sustained seismic slip) with increasing fluid pressure leads to aseismic slip (Cappa et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Prevalence of Aseismic Slip Linking Fluid Injection to Natural and Anthropogenic Seismic Swarms

et al. 2022

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Anthropogenic fluid injections at depth induce seismicity which is generally organized as swarms, clustered in time and space, with moderate magnitudes. Earthquake swarms also occur in various geological contexts such as subduction zones, mountain ranges, volcanic, and geothermal areas. While some similarities between anthropogenic and natural swarms have already been observed, whether they are driven by the same mechanism, or by different factors, is still an open question. Fluid pressure diffusion or aseismic deformation processes are often proposed to explain observations of hypocenters migration during swarms, while recent models suggest that swarm seismicity is rather triggered by fluid‐induced aseismic fault slip. Here, using a global compilation of 22 natural and anthropogenic swarms, we observe that duration, migration velocity, and total moment scale similarly for all swarms. This supports a common driving process for both natural and induced swarms. The scaling relations are similar to those found for slow slip events. These observations highlight the prevalence of fluid‐induced aseismic slip as main driver of earthquakes migration during swarms. After quantifying aseismic slip released in the swarms, we propose an approach to estimate the seismic‐to‐total moment ratio, which we then compare to a theoretical estimation that depends on the migration velocity of the swarm and the effective stress drop. Our findings lead to a generic explanation of the process driving earthquake swarms that might open new possibilities to monitor seismic swarms.

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Section: Introductionmentioning

confidence: 99%

Prevalence of Aseismic Slip Linking Fluid Injection to Natural and Anthropogenic Seismic Swarms

et al. 2022

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“…Second, how dilatancy affects the fault response due to injection. Dilatancy is already understood to be a stabilizing mechanism (Rudnicki & Chen, 1988; Segall & Rice, 1995; Segall et al., 2010), although only a limited study of coupled injection and dilatancy has been carried out (except Ciardo & Lecampion, 2019; Yang & Dunham, 2021). Thus our general finding, that fault slip is stabilized and aseismic slip is promoted when dilatancy is included is not surprising.…”

Section: Discussionmentioning

confidence: 99%

“…Multiple mechanisms may act at a time. Recently, numerical simulations have started exploring the simultaneous injection and inelastic dilatancy in a diffusive shear zone (Ciardo & Lecampion, 2019; Yang & Dunham, 2021). However, these efforts have been limited to a non‐diffusive and elastic bulk.…”

Section: Introductionmentioning

confidence: 99%

A Spectral Boundary‐Integral Method for Faults and Fractures in a Poroelastic Solid: Simulations of a Rate‐and‐State Fault With Dilatancy, Compaction, and Fluid Injection

et al. 2022

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“…A key element in the interaction of pore fluid with deformation is the evolution of porosity (Heimisson et al., 2021, 2022; Segall et al., 2010; Segall & Rice, 1995; Yang & Dunham, 2021). This paper examines and compares two proposals for this evolution (Segall & Rice, 1995; Sleep, 1995) in the context of rate and state friction.…”

Section: Introductionmentioning

confidence: 99%

Porosity Evolution in Rate and State Friction

Rudnicki

2022

Geophysical Research Letters

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Effect of Porosity and Permeability Evolution on Injection-Induced Aseismic Slip

Cited by 6 publications

References 0 publications

Prevalence of Aseismic Slip Linking Fluid Injection to Natural and Anthropogenic Seismic Swarms

Prevalence of Aseismic Slip Linking Fluid Injection to Natural and Anthropogenic Seismic Swarms

A Spectral Boundary‐Integral Method for Faults and Fractures in a Poroelastic Solid: Simulations of a Rate‐and‐State Fault With Dilatancy, Compaction, and Fluid Injection

Porosity Evolution in Rate and State Friction

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