scholarly journals Quantitative analysis of seismic fault zone waves in the rupture zone of the 1992 Landers, California, earthquake: evidence for a shallow trapping structure

2003 ◽  
Vol 155 (3) ◽  
pp. 1021-1041 ◽  
Author(s):  
Zhigang Peng ◽  
Yehuda Ben-Zion ◽  
Andrew J. Michael ◽  
Lupei Zhu
Keyword(s):  
Quantitative Analysis ◽  
Fault Zone ◽  
Rupture Zone ◽  
Seismic Fault ◽  
Fault Zone Waves

scholarly journals High-resolution Imaging of Fault Zone Structures with Seismic Fault Zone Waves

2007 ◽  
Vol SpecialIssue ◽  
pp. 78-79 ◽  
Author(s):  
Y. Ben-Zion ◽  
Z. Peng ◽  
M. Lewis ◽  
J. McGuire
Keyword(s):  
High Resolution ◽  
Fault Zone ◽  
High Resolution Imaging ◽  
Seismic Fault ◽  
Resolution Imaging ◽  
Fault Zone Structures ◽  
Fault Zone Waves

No abstract available. <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.s01.23.2007" target="_blank">10.2204/iodp.sd.s01.23.2007</a>

scholarly journals Numerical modelling technique for predicting the seismic fault zone (SFZ) in the earthquakes affected area, NW Himalayas with its neotectonic implication

1970 ◽  
Vol 2 (2) ◽  
pp. 57-65
Author(s):  
M Farhad Howladar ◽  
Sharmin Afroz ◽  
Shofiqul Islam
Keyword(s):  
Fault Zone ◽  
Numerical Technique ◽  
Strain Analysis ◽  
Normal Fault ◽  
Focal Mechanism Solution ◽  
Mathematical Form ◽  
Finite Elements Analysis ◽  
Nw Himalaya ◽  
Potential Region ◽  
Seismic Fault

Finite elements analysis is a powerful tool, often used for analyzing problems on stress, that can be successfully employed to analyze the finite deformation of geological structures in a mathematical form on a digital computer. Over the last century, great earthquakes with magnitudes of 7->8 have struck in the NW Himalaya; the 1905 Kangra earthquake is one of them. This study performed a plane strain analysis of failure stress and faults in these earthquakes potential region based on the seismic geologic cross profile employing the two-dimensional finite element method under elastic material state with Mohr Coulomb failure criterion. The results show that the normal fault initiates at deeper level, whereas with increasing convergent displacement the thrust fault appears in the shallower region. The results of the simulation are compared with the available seismic and earthquakes focal mechanism solution data of the area which shows the close similarities between the distribution of simulated fault and microseismicity in the deeper region of Chamba Nappe (CN) and along the upper part of the Mid Crustal Ramp (MCR) which might be the Seismic Fault Zone (SFZ) of the region. Moreover, the intense localization of faults along the frontal part of the model indicates that this part is active in nature at present, which is responsible for the neotectonics in the Himalayas. Keywords: NW Himalaya; numerical technique; seismic fault zone; neotectonics DOI: 10.3329/jles.v2i2.7499 J. Life Earth Sci., Vol. 2(2) 57-65, 2007  

Study on rupture zone of the M=8.1 Kunlun Mountain earthquake using fault-zone trapped waves

2005 ◽  
Vol 18 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Song-lin Li ◽  
Xian-kang Zhang ◽  
Ji-chang Fan
Keyword(s):  
Fault Zone ◽  
Rupture Zone ◽  
Trapped Waves ◽  
Kunlun Mountain

Response Analysis of Bridge across Seismic Fault Zone

2012 ◽  
Vol 178-181 ◽  
pp. 2224-2227
Author(s):  
Qi Zhen Li ◽  
Hong Quan Li ◽  
Zhi Qian Zhang
Keyword(s):  
Fault Zone ◽  
Bridge Pier ◽  
Additional Stress ◽  
Response Analysis ◽  
Geological Condition ◽  
Structure Model ◽  
Bridge Structure ◽  
Continuous Beam ◽  
Seismic Fault ◽  
Deformation Law

Through simulating the happening location of the fault zone, the structure model is duly simplified, analysing the forced deformation law of the bridge surface with different fault zone position. Because of statically indeterminate structure, continuous beam shall be produced larger additional moment, shear force and torque as a result of displacement in bridge pier, additional stress will be increased with the the increasement of fault zone displacement, especially for the top surface parts of bridge pier. Hence, the corresponding position of the structure and construction measures for reinforcement should strengthened, the overall rigidity of the structure should be improved, and based on the study of the bridge across the fault zone is a simplified, and the actual stress process may be more complex, the investigation on geological condition must be clear, and avoid the bridge structure crossing fault zone.

scholarly journals Coseismic fluid–rock interactions in the Beichuan-Yingxiu surface rupture zone of the Mw 7.9 Wenchuan earthquake and its implication for the fault zone transformation

2020 ◽  
Author(s):  
Yangyang Wang ◽  
Xiaoqi Gao ◽  
Sijia Li ◽  
Shiyuan Wang ◽  
Deyang Shi ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Fault Zone ◽  
Structural Characteristics ◽  
Damage Zone ◽  
Major Elements ◽  
Rupture Zone ◽  
Surface Rupture ◽  
Fault Rock ◽  
Surface Rupture Zone ◽  
Geochemical Variations

Abstract. Mechanism of fluids in modifying mineralogy and geochemistry of the fault zone and the role of rock-fluid interaction in the faulting weakening is still debatable. Through analyzing mineralogical compositions, major elements as well as micro-structural characteristics of outcrop samples including wall rocks, low damage zone, high damage zone and oriented fault gouge samples from principal slip zone gouges, mineralogical and geochemical variations of the fault-rocks is observed from Shaba outcrop of Beichuan-Yingxiu surface rupture zone of the Mw 7.9 Wenchuan earthquake, China. The element enrichment/depletion pattern of fault rock shows excellent consistency with the variation pattern of minerals in terms of the notable feldspar alteration and decomposition, decarbonization, coseismic illitization, and chloritization that occurs in the fault zone. The Isocon analysis indicates that the overall mass loss amount of the Shaba fault zone is ranked as low damage zone 

Seismic fault zone trapped noise

2014 ◽  
Vol 119 (7) ◽  
pp. 5786-5799 ◽  
Author(s):  
G. Hillers ◽  
M. Campillo ◽  
Y. Ben-Zion ◽  
P. Roux
Keyword(s):  
Fault Zone ◽  
Seismic Fault
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