Reply to “Comment on ‘Earthquake cycles and physical modeling of the process leading up to a large earthquake’”

Ohnaka, Mitiyasu

doi:10.1186/bf03352654

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…As stated in sections 1 and 3, the slip‐dependent constitutive law is the only formulation that makes it possible to govern the stability or instability of the shear fracture which possibly occurs at local strong areas called “asperities” on faults, and the law automatically satisfies the Griffith energy balance fracture criterion. In addition, formulation of the governing law as a slip‐dependent constitutive law is more appropriate than any other formulation for accounting for scale‐dependent physical quantities inherent in the rupture quantitatively [ Ohnaka , 2006]. This is because the scale‐dependent physical quantities scale straightforwardly with the breakdown displacement D c eff , which is directly related to the geometric length of the coherent zone of rupture breakdown [see Ohnaka , 2000, 2003, 2004].…”

Section: Discussionmentioning

confidence: 99%

Depth dependence of constitutive law parameters for shear failure of rock at local strong areas on faults in the seismogenic crust

Kato

2007

J. Geophys. Res.

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[1] In the framework of slip-dependent constitutive formulation, which leads to a unifying law that governs not only frictional slip failure at precut interface areas on faults but also shear fracture of intact rock at local strong areas on the faults, a thorough investigation has been made about how the constitutive law (of dimensionless form) for rock failure at local strong areas on faults is affected by seismogenic crustal conditions of effective normal stress, pore pressure, and temperature, on the basis of laboratory data on the shear fracture of granite rock obtained by Kato et al. (2003a) under crustal conditions simulated in the laboratory. It has been revealed how dimensionless constitutive law parameters distinctively vary with depth, depending on the crustal conditions simulated; consequently, the constitutive behavior including the slip-weakening phase also distinctively varies with depth. This behavior in the regime of suprahydrostatic pore pressure clearly differs from that in the regime of hydrostatic pore pressure. The results of this study are suited for implementation in a numerical code, and the constitutive properties of rock failure at local strong areas (called ''asperites'') on faults will be easily assimilated into numerical models of earthquake ruptures for realistic computer simulation.Citation: Ohnaka, M., and A. Kato (2007), Depth dependence of constitutive law parameters for shear failure of rock at local strong areas on faults in the seismogenic crust,

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Section: Discussionmentioning

confidence: 99%

Depth dependence of constitutive law parameters for shear failure of rock at local strong areas on faults in the seismogenic crust

Kato

2007

J. Geophys. Res.

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Parameters for Earthquake Rupture Dynamics

Fukuyama¹

2009

JSSJ

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Recent progress on our understanding of earthquake rupture dynamics based on seismological observations is reviewed. One of the most important advances is the physical understanding of breakdown process that occurs at the propagating rupture front of earthquakes. The parameters such as breakdown stress drop, slip-weakening distance and fracture energy, which control the progress of dynamic rupture propagation, have now been able to be estimated. Fracture energy and hence slip-weakening distance are found to be scale dependent. To achieve such scale dependence, several different physical processes might microscopically develop, one of which dominates depending on the environmental situation at the source. Then its macroscopic behavior becomes quite simple and seems to be modeled with a single law.

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Reply to “Comment on ‘Earthquake cycles and physical modeling of the process leading up to a large earthquake’”

Cited by 2 publications

References 15 publications

Depth dependence of constitutive law parameters for shear failure of rock at local strong areas on faults in the seismogenic crust

Depth dependence of constitutive law parameters for shear failure of rock at local strong areas on faults in the seismogenic crust

Parameters for Earthquake Rupture Dynamics

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