scholarly journals A comparison between Dc′-values obtained from a dynamic rupture model and waveform inversion

2005 ◽  
Vol 32 (14) ◽  
pp. n/a-n/a ◽  
Author(s):  
Takumi Yasuda ◽  
Yuji Yagi ◽  
Takeshi Mikumo ◽  
Takashi Miyatake
Keyword(s):  
Waveform Inversion ◽  
Dynamic Rupture ◽  
Dynamic Rupture Model ◽  
Rupture Model

scholarly journals FUNDAMENTAL STUDY ON PULSE-TYPE EARTHQUAKE MOTION NEAR SEISMIC FAULT BASED ON DYNAMIC RUPTURE MODEL

2015 ◽  
Vol 21 (47) ◽  
pp. 83-88
Author(s):  
Masayuki NAGANO ◽  
Ryo UEDA ◽  
Kenichi KATO ◽  
Yasuhiro OTSUKA ◽  
Kazuhito HIKIMA ◽  
...  
Keyword(s):  
Dynamic Rupture ◽  
Fundamental Study ◽  
Seismic Fault ◽  
Earthquake Motion ◽  
Dynamic Rupture Model ◽  
Pulse Type ◽  
Rupture Model

Exploring Physical Links between Fluid Injection and Nearby Earthquakes: The 2012 Mw 4.8 Timpson, Texas, Case Study

2020 ◽  
Vol 110 (5) ◽  
pp. 2350-2365 ◽  
Author(s):  
Dawid Szafranski ◽  
Benchun Duan
Keyword(s):  
Aftershock Sequence ◽  
Fluid Injection ◽  
Dynamic Rupture ◽  
Predictive Tool ◽  
Dynamic Friction Coefficient ◽  
Effective Normal Stress ◽  
A Value ◽  
Dynamic Rupture Model ◽  
Rupture Model

ABSTRACT In this work, we integrate a fluid-flow model of 3D deformable porous media with a dynamic rupture model of earthquakes in 3D heterogeneous geologic medium. The method allows us to go beyond fault failure potential analyses and to examine how big an earthquake can be if part of a fault reaches failure due to fluid injection. We apply the method to the 17 May 2012 Mw 4.8 Timpson, Texas, earthquake as a case study. The simulated perturbations of pore pressure and stress from wastewater injection at the time of the mainshock are high enough (several MPa) to trigger an earthquake. Dynamic rupture modeling could reproduce the major observations from the Mw 4.8 event, including its size, focal mechanism, and aftershock sequence, and thus building a more convincing physical link between fluid injection and the Mw 4.8 earthquake. Furthermore, parameter space studies of dynamic rupture modeling allow us to place some constraints on fault frictional properties and background stresses. For the Timpson case, we find that a dynamic friction coefficient of ∼0.3, a value of ∼0.1  m for the critical slip distance in the slip-weakening friction law, and uniform effective normal stress are associated with the Timpson earthquake fault. By reproducing main features of the aftershock sequence of the mainshock, we also demonstrate that the method has potential to become a predictive tool for fluid injection design in the future.

scholarly journals Simulation of Strong Ground Motions of the 2016 Tottori-Chubu Earthquake based on Dynamic Rupture Model

2019 ◽  
Vol 19 (5) ◽  
pp. 5_125-5_135
Author(s):  
Tetsushi WATANABE ◽  
Kenichi KATO ◽  
Yasuhiro OHTSUKA ◽  
Kazuhito HIKIMA ◽  
Tomiichi UETAKE ◽  
...  
Keyword(s):  
Ground Motions ◽  
Dynamic Rupture ◽  
Strong Ground Motions ◽  
Dynamic Rupture Model ◽  
Rupture Model ◽  
Strong Ground

A Dynamic-Rupture Model of the 2019 Mw 7.1 Ridgecrest Earthquake Being Compatible with the Observations

2020 ◽  
Author(s):  
Zhenguo Zhang ◽  
Wenqiang Zhang ◽  
Danhua Xin ◽  
Kejie Chen ◽  
Xiaofei Chen
Keyword(s):  
Global Positioning System ◽  
Strong Ground Motion ◽  
Fault Plane ◽  
Positioning System ◽  
Dynamic Rupture ◽  
Global Positioning ◽  
Dynamic Rupture Model ◽  
Rupture Model ◽  
Strong Ground ◽  
Good Agreement

Abstract We explore the 2019 Mw 7.1 Ridgecrest earthquake dynamic rupture on the nonplanar fault with homogeneous dynamic parameters using a layered media model. Our model shows that this event produced an average of 1.9 m of right-lateral slip with a maximum slip of ∼4.2  m at the place near the epicenter, and the variation of fault-plane strike angles from the middle to the southeastern segment appears to have behaved as a “stress barrier,” which postponed the rupture. We also compare the synthetics based on our dynamic rupture with the field records and find good agreement with the static Global Positioning System (GPS) coseismic offsets and strong ground motion waveforms. Our work provides a dynamic-rupture interpretation of the Mw 7.1 Ridgecrest earthquake.

Spontaneous dynamic rupture modeling of 2017 M 5.4 Pohang, South Korea, earthquake, using the slip-weakening friction law

2020 ◽  
Author(s):  
Seok Goo Song ◽  
Chang Soo Cho ◽  
Geoffrey Ely
Keyword(s):  
Stress Drop ◽  
High Performance ◽  
Slip Model ◽  
Dynamic Rupture ◽  
Coseismic Slip ◽  
Southeastern Part ◽  
Friction Law ◽  
Initial Nucleation ◽  
Dynamic Rupture Model ◽  
Rupture Model

<p>An M 5.4 earthquake occurred in the southeastern part of the Korean Peninsula in 2017. It is an oblique thrust event that occurred at a relatively shallow depth (~ 5 km) although it did not create coseismic surface rupture. A coseismic slip model was successfully obtained by inverting the ground displacement field extracted by the InSAR data (Song and Lee, 2019). In this study, we performed spontaneous dynamic rupture modeling using the slip weakening friction law. The static stress drop distribution obtained by the coseismic slip model was used as an input stress field. We adopted high performance computing (HPC) using the parallelized dynamic rupture modeling code (SORD, Support Operator Rupture Dynamics). Although our target event is moderate-sized one, we can successfully produce a spontaneous dynamic rupture model using a relatively small initial nucleation patch (radius ~ 1 km) with a relatively small slip weakening distance (~ 5 cm). Our preliminary results show that the rupture creates an asperity near the initial nucleation zone with approximately 4 MPa stress drop, then propagates obliquely upward both in the northeast and southwest directions. Although we assumed a single planar fault plane in our current rupture modeling, it seems worthwhile to dynamically model the rupture process, including complex fault geometry in following studies. Dynamic rupture modeling for a natural earthquake provides an opportunity to understand the dynamic rupture characteristics of the earthquake, including both stress drop and fracture energy.</p>

scholarly journals Dynamic fault rupture processes of moderate-size earthquakes inferred from the results of kinematic waveform inversion

1994 ◽  
Vol 37 (6) ◽  
Author(s):  
T. Mikumo
Keyword(s):  
Stress Drop ◽  
Dynamic Models ◽  
Waveform Inversion ◽  
Dynamic Crack ◽  
Dynamic Rupture ◽  
Heterogeneous Distribution ◽  
Moderate Size ◽  
Fault Strength ◽  
Kinematic Modelling ◽  
Kinematic Waveform Inversion

Several attempts have been made recently to infer the dynamic rupture processes of moderate-size earthquakes from kinematic waveform inversion and dynamic crack inversion. These studies have revealed a quite heterogeneous distribution of dynamic stress drop and relative fault strength over the fault for most earthquakes. In two strike-slip California earthquakes, negative stress drop has been identified in a shallow section of the fault, suggesting the possible existence of a zone of velocity-strengthening frictions. The dynamic models yielded quite short rise times comparable to those inferred from kinematic modelling of observed waveforms. The short slip durations for these earthquakes may probably be attributed to shorter length scale of fault segmentation due to the heterogeneities of shear stress and fault strength.

Constraining Fault Geomechanics Using Elastic Waveform Inversion and Dynamic Rupture Modelling

2019 ◽  
Author(s):  
C. Willacy ◽  
P. Van den Bogert ◽  
E. Van Dedem ◽  
J. Blokland
Keyword(s):  
Waveform Inversion ◽  
Dynamic Rupture
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