Slip-weakening and interactive dynamics of an heterogeneous seismic source

Senatorski, Piotr

doi:10.1016/s0040-1951(01)00263-3

Cited by 7 publications

(29 citation statements)

References 41 publications

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“…Such a kinematic view is meant as representing the averaged earthquake rupture process, so it must be simplistic. Both observational data analysis and computer simulations, which are based on the microscopic seismic source model in which shapes of the slip velocity pulses are not assumed a priori (e.g., Senatorski, 2002;2006), support this view: Statistical relations between the simulated and real earthquake parameters are consistent with the scaling relations implied by the macroscopic model.…”

Section: Discussion and Summarymentioning

confidence: 82%

“…It is related to the microscopic earthquake source model formulated in terms of evolution of slip and stress fields over the rupture area (Senatorski, 2002). The link between the two models is the seismic energy formulation (7), which is explained in detail in the Appendix.…”

Section: Discussion and Summarymentioning

confidence: 99%

“…Equivalently, friction, not inertia, dominates fault dynamics. It has been argued that this assumption is acceptable in the case of narrow earthquake rupture pulses (e.g., Senatorski, 2002;cf. Ida, 1972).…”

Section: Discussion and Summarymentioning

confidence: 99%

“…Slip velocity patterns are much more complex than the propagating triangle in real world. However, this model represents the macroscopic aproach, so it should be defined by an averaged slip velocity pulse of a given shape (realistic slip and stress patterns have been obtained in computer simulations by using the corresponding microscopic model, e.g., Senatorski, 2002;2006). Besides, it reproduces essential A c c e p t e d M a n u s c r i p t characteristics of the rupture process, understood as propagation of a narrow zone of slip movement, driven by stress concentration within and ahead of this zone.…”

Section: Slip Velocity Pulsesmentioning

confidence: 99%

“…5b), measured at a given point on the fault plane during three consecutive simulated earthquakes, are shown as an example. The simulations are based on the microscopic earthquake source model (see, for details, Senatorski, 2002;2006). They were performed for the 100 × 24 km 2 strike slip fault with strengths (the peak values of the slip dependent cohesive stress) distributed randomly around 6 MPa, with two stronger barriers, and the critical slip distances of 0.6 m distributed uniformly.…”

Section: A4 Interpretationmentioning

confidence: 99%

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Apparent stress scaling for tectonic and induced seismicity: Model and observations

Senatorski¹

2008

Physics of the Earth and Planetary Interiors

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To cite this version:Piotr Senatorski. Apparent stress scaling for tectonic and induced seismicity: Model and observations. Physics of the Earth and Planetary Interiors, Elsevier, 2008, 167 (1-2) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Page 1 it is related to the rupture initiation, propagation and arrest conditions; therefore, it reflects earthquake rupture dynamics. Additional shiftings among the trend lines obtained for the smallest induced tremors, larger tectonic earthquakes, and slow tsunami earthquakes, reflect differences between the intact rock failure and the frictional slip failure, that is, between fracture energies of these different earthquake classes.

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Section: Discussion and Summarymentioning

confidence: 82%

Section: Discussion and Summarymentioning

confidence: 99%

Section: Discussion and Summarymentioning

confidence: 99%

Section: Slip Velocity Pulsesmentioning

confidence: 99%

Section: A4 Interpretationmentioning

confidence: 99%

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Apparent stress scaling for tectonic and induced seismicity: Model and observations

Senatorski¹

2008

Physics of the Earth and Planetary Interiors

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Effect of Slip-Weakening Distance on Seismic–Aseismic Slip Patterns

Senatorski

2019

Pure Appl. Geophys.

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In order to explain the seismic-aseismic slip patterns observed on megathrust faults, numerical simulations were carried out using the quasi-dynamic asperity fault model with the slip-dependent friction and stress-dependent healing. Two friction law parameters, strength and slip-weakening distance, are interpreted in the subduction channel context. The parameters are treated as random fields with specified characteristics. Their distributions define heterogeneities of the interplate frictional coupling. The higher strength regions accumulate stresses, whereas the slip-weakening distance lengths control the stress release rates. The simulation results indicate that the slip-dependent asperity model reproduces key features of real megathrust fault behavior. First, stable and unstable slip movements can occur at the same locations, even if the friction parameters are fixed. Second, two rupture styles, single asperity breaks and wide, smooth, propagating rupture fronts, can be distinguished. The latter style is responsible for large slips near the free surface, where lower fault strengths are expected. The reason for these effects is that slip instabilities depend both on local friction and on the system stiffness, which is related to the slipping area size and distribution of slips. It is also shown that the high-strength interplate patches, such as subducted seamounts, can both promote and restrain large earthquakes, depending on the slip-weakening distance lengths.

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Gutenberg–Richter’s b Value and Earthquake Asperity Models

Senatorski

2019

Pure Appl. Geophys.

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Slip-weakening and interactive dynamics of an heterogeneous seismic source

Cited by 7 publications

References 41 publications

Apparent stress scaling for tectonic and induced seismicity: Model and observations

Apparent stress scaling for tectonic and induced seismicity: Model and observations

Effect of Slip-Weakening Distance on Seismic–Aseismic Slip Patterns

Gutenberg–Richter’s b Value and Earthquake Asperity Models

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