首页|Numerical simulations of earthquake rupture induced by pressure perturbation

Numerical simulations of earthquake rupture induced by pressure perturbation

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  • 国家科技期刊平台
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The subsurface fluid injection can cause pressure increase within faults,leading to earthquake occur-rences.However,the factors controlling earthquake rupture due to pressure perturbation remain poorly understood.To resolve this problem,we simulate the physical processes of earthquake nucleation and rupture on strike-slip faults perturbated by pressure migration based on the slip-weakening law.Mul-tiple kinds of factors,including background stress,fluid injection rates,the area of the pressurized region,fault geometry,and fault friction coefficients,are considered in our simulations.Our simulation results reveal that the ratio of shear stress to normal stress rather than their absolute values controls the rupture behavior.With the large stress ratios,high injection rates,and large pressurized areas,earthquakes are prone to propagate as runaway ruptures.Additionally,faults with large aspect ratios of length to width are also favorable for causing runaway ruptures.In contrast,the factors of fault strike,dip angles and friction coefficients have minor influence on rupture behavior.

Induced seismicityFinite element simulationRupture mode

Bingquan Ren、Caijun Xu、Guoyan Jiang、Lei Yang

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School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China

Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan University,Wuhan 430079,China

Key Laboratory of Geophysical Geodesy,Ministry of Natural Resources,Wuhan 430079,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities

42130101420740072042023kf1035

2024

10.1016/j.geog.2024.01.007

大地测量与地球动力学(英文版)
中国地震局地震研究所

大地测量与地球动力学(英文版)

EI
影响因子：0.568
ISSN：1674-9847
年,卷(期)：2024.15(5)