scholarly journals Dynamic rupture of crosscutting faults: A possible rupture process for the 2007Mw6.6 Niigata-ken Chuetsu-Oki earthquake

2010 ◽  
Vol 115 (B5) ◽  
Author(s):  
Hideo Aochi ◽  
Aitaro Kato
Keyword(s):  
Rupture Process ◽  
Dynamic Rupture

Multicycle Simulation of Strike-Slip Earthquake Rupture for Use in Near-Source Ground-Motion Simulations

2021 ◽  
Author(s):  
Percy Galvez ◽  
Anatoly Petukhin ◽  
Paul Somerville ◽  
Jean-Paul Ampuero ◽  
Ken Miyakoshi ◽  
...  
Keyword(s):  
Ground Motion ◽  
Stress Drop ◽  
Slip Rate ◽  
Rupture Process ◽  
Earthquake Rupture ◽  
Rupture Velocity ◽  
Source Inversion ◽  
Dynamic Rupture ◽  
Wide Range ◽  
Source Scaling

ABSTRACT Realistic dynamic rupture modeling validated by observed earthquakes is necessary for estimating parameters that are poorly resolved by seismic source inversion, such as stress drop, rupture velocity, and slip rate function. Source inversions using forward dynamic modeling are increasingly used to obtain earthquake rupture models. In this study, to generate a large number of physically self-consistent rupture models, rupture process of which is consistent with the spatiotemporal heterogeneity of stress produced by previous earthquakes on the same fault, we use multicycle simulations under the rate and state (RS) friction law. We adopt a one-way coupling from multicycle simulations to dynamic rupture simulations; the quasidynamic solver QDYN is used to nucleate the seismic events and the spectral element dynamic solver SPECFEM3D to resolve their rupture process. To simulate realistic seismicity, with a wide range of magnitudes and irregular recurrence, several realizations of 2D-correlated heterogeneous random distributions of characteristic weakening distance (Dc) in RS friction are tested. Other important parameters are the normal stress, which controls the stress drop and rupture velocity during an earthquake, and the maximum value of Dc, which controls rupture velocity but not stress drop. We perform a parametric study on a vertical planar fault and generate a set of a hundred spontaneous rupture models in a wide magnitude range (Mw 5.5–7.4). We validate the rupture models by comparison of source scaling, ground motion (GM), and surface slip properties to observations. We compare the source-scaling relations between rupture area, average slip, and seismic moment of the modeled events with empirical ones derived from source inversions. Near-fault GMs are computed from the source models. Their peak ground velocities and peak ground accelerations agree well with the ground-motion prediction equation values. We also obtain good agreement of the surface fault displacements with observed values.

Modeling Earthquakes Using Fractal Circular Patch Models with Lessons from the 2011 Tohoku-Oki Earthquake

2014 ◽  
Vol 9 (3) ◽  
pp. 264-271 ◽  
Author(s):  
Satoshi Ide ◽  
◽  
Hideo Aochi ◽  
Keyword(s):  
Fault Plane ◽  
Large Earthquake ◽  
Rupture Process ◽  
Fault System ◽  
External Loading ◽  
Dynamic Rupture ◽  
Consistent Model ◽  
Wide Scale ◽  
Seismicity Catalog ◽  
Large Earthquakes

Earthquakes occur in a complex hierarchical fault system, meaning that a realistic mechanically-consistent model is required to describe heterogeneity simply and over a wide scale. We developed a simple conceptual mechanical model using fractal circular patches associated with fracture energy on a fault plane. This model explains the complexity and scaling relation in the dynamic rupture process. We also show that such a fractal patch model is useful in simulating longterm seismicity in a hierarchal fault system by using external loading. In these studies, an earthquake of any magnitude appears as a completely random cascade growing from a small patch to larger patches. This model is thus potentially useful as a benchmarking scenario for evaluating probabilistic gain in probabilistic earthquake forecasts. The model is applied to the real case of the 2011 Tohoku-Oki earthquake based on prior information from a seismicity catalog to reproduce the complex rupture process of this very large earthquake and its resulting ground motion. Provided that a high-quality seismicity catalog is available for other regions, similar approach using this conceptual model may provide scenarios for other potential large earthquakes.

Dynamic rupture process of the 1999 Chi-Chi, Taiwan, earthquake

2004 ◽  
Vol 31 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Wenbo Zhang ◽  
Tomotaka Iwata ◽  
Kojiro Irikura ◽  
Arben Pitarka ◽  
Haruko Sekiguchi
Keyword(s):  
Rupture Process ◽  
Dynamic Rupture ◽  
Taiwan Earthquake

scholarly journals Dynamic rupture process of the 1999 Chi-Chi, Taiwan, earthquake

2009 ◽  
Vol 22 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Haiming Zhang ◽  
Xiaofei Chen
Keyword(s):  
Rupture Process ◽  
Dynamic Rupture ◽  
Taiwan Earthquake

Rupture of Thin Power-Law Liquid Film on a Cylinder

2000 ◽  
Vol 68 (2) ◽  
pp. 294-297 ◽  
Author(s):  
Rama Subba Reddy Gorla
Keyword(s):  
Liquid Film ◽  
Power Law ◽  
Body Force ◽  
Finite Amplitude ◽  
Rupture Process ◽  
Dynamic Rupture ◽  
Balance Equations ◽  
Initial Value ◽  
Power Law Exponent ◽  
The Stability

The dynamic rupture process of a thin power-law type non-Newtonian liquid film on a cylinder has been analyzed by investigating the stability to finite amplitude disturbances. The dynamics of the liquid film is formulated using the balance equations including a body force term due to van der Waals attractions. The governing equation for the film thickness was solved by finite difference method as part of an initial value problem for spatial periodic boundary conditions. A decrease in the cylinder radius will induce a stronger lateral capillary force and thus will accelerate the rupture process. The influence of the power-law exponent on rupture is discussed.

scholarly journals Analysis of rupture mode and acoustic emission characteristic of rock and coal samples with holes

2019 ◽  
Vol 16 (4) ◽  
pp. 811-820
Author(s):  
Dong Chen ◽  
Enyuan Wang ◽  
Nan Li
Keyword(s):  
Acoustic Emission ◽  
Coal Sample ◽  
Rock Sample ◽  
Rupture Process ◽  
Spatial Evolution ◽  
Dynamic Rupture ◽  
Fractal Characteristic ◽  
Two Samples ◽  
Rupture Mode ◽  
Variation Rule

Abstract In order to understand the rupture mechanism of rock and coal samples with holes, the acoustic emission (AE) tests of rock and coal samples with holes under uniaxial compression are done. Through the AE tests, the basic mechanical and AE variation rule of two samples in the total rupture process are obtained, the dynamic rupture process was observed and finally the spatial evolution and multi-fractal characteristic of AE are analyzed. The results show that the variation rule of AE events of two samples are coincident with the variation rule of stress. The uniaxial compressive strength of a rock sample with a hole is about five times than that of a coal sample with a hole, and the maximum AE pulsing counts (AEPC) of a rock sample with a hole is much larger than that of a coal sample with a hole. Due to the variation of lithology, the dynamic rupture process and the spatial evolution rule of AE events of rock and coal samples with holes are obviously different. But the distributions of the three-dimensional locations of the two samples are coincident with the macroscopic rupture morphology. Both of them have multi-fractal characteristic in the process of rupture, the multi-fractal spectrum width Δf(α) at the time of rupture is smaller than that before rupture and the Δf(α) before rupture is smaller than that after rupture. This indicates that the energy (E) before and after rupture is smaller than that at the time of rupture, the E after rupture is smaller than that before rupture and the E of a coal sample with a hole in each stage is less than that of the corresponding stages of a rock sample with a hole.

The dynamic rupture process of the 1993 Kushiro-oki earthquake

1996 ◽  
Vol 101 (B3) ◽  
pp. 5661-5675 ◽  
Author(s):  
Satoshi Ide ◽  
Minoru Takeo
Keyword(s):  
Rupture Process ◽  
Dynamic Rupture

scholarly journals The dynamic rupture process of the 2001 Geiyo, Japan, earthquake

2004 ◽  
Vol 31 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Takashi Miyatake ◽  
Yuji Yagi ◽  
Takumi Yasuda
Keyword(s):  
Rupture Process ◽  
Dynamic Rupture
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