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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union

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doi:10.5194/npg-2016-66
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
12 Dec 2016
Review status
This discussion paper is under review for the journal Nonlinear Processes in Geophysics (NPG).
Non-linear effects of pore pressure increase on seismic event generation in multi-degree-of-freedom rate-and-state model of tectonic fault sliding
Sergey B. Turuntaev1,2,3 and Vasily Y. Riga2 1Institute of Geosphere Dynamics, Russian Academy of Sciences, Moscow, 119334, Russia
2Moscow Institute of Physics and Technology, Moscow, 141701, Russian Federation
3All-Russian Research Institute of Automatics, Moscow, 127055, Russian Federation
Abstract. The influence of fluid injection on tectonic fault sliding and generation of seismic events was studied by multi-degree-of-freedom rate-and-state friction model with two-parametric friction law. A system of blocks (up to 25 blocks) elastically connected with each other and connected by elastic springs to a constant-velocity moving driver was considered. Variation of the pore pressure due to fluid injection led to variation of effective stress between the first block and the substrate. Initially the block system was in steady-sliding state, then its state was changed by the pore pressure increase. The influence of the model parameters (number of the blocks, the spring stiffness, velocity weakening parameter) on the seismicity variations were considered. Various slip patterns were obtained and analysed.

Citation: Turuntaev, S. B. and Riga, V. Y.: Non-linear effects of pore pressure increase on seismic event generation in multi-degree-of-freedom rate-and-state model of tectonic fault sliding, Nonlin. Processes Geophys. Discuss., doi:10.5194/npg-2016-66, in review, 2016.
Sergey B. Turuntaev and Vasily Y. Riga
Sergey B. Turuntaev and Vasily Y. Riga
Sergey B. Turuntaev and Vasily Y. Riga

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Short summary
The influence of fluid injection on tectonic fault sliding and generation of seismic events was studied in the paper by multi-degree-of-freedom rate-and-state friction model with two-parametric friction law. It was found that considered system could exhibit different types of motion. The main seismic activity could appear directly after the start of fluid injection or in the post-injection phase (after some days, months). Such influence of injection on seismicity is observed in the real cases.
The influence of fluid injection on tectonic fault sliding and generation of seismic events was...
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