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. Riga21Institute 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
Received: 01 Nov 2016 – Accepted for review: 29 Nov 2016 – Discussion started: 12 Dec 2016
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.
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.