نتایج جستجو برای: fault zone
تعداد نتایج: 171894 فیلتر نتایج به سال:
Seismic velocity changes and nonvolcanic tremor activity in the Parkfield area in California reveal that large earthquakes induce long-term perturbations of crustal properties in the San Andreas fault zone. The 2003 San Simeon and 2004 Parkfield earthquakes both reduced seismic velocities that were measured from correlations of the ambient seismic noise and induced an increased nonvolcanic trem...
The Naft anticline with NW-SE trend is located in north of the Lurestan sub-zone and the Zagros fold and thrust belt. Thrust and basement strike-slip faults and detachment levels play an important role in the structural geometry of the folded structures in this is sub-zone. In this research, deformational pattern and structural geometry of the Naft anticline hane been studied using constration...
In this work, two separate fault detection models are developed: one for the detection of faulty operation of a deep-trough hydroponic system which is caused by mechanical, actuator or sensor faults, and one for the detection of a category of biological faults (i.e. specific stressed situations of the plants), namely the ‘‘transpiration fault’’. The neural network methodology was proved to be s...
This study provides an example of fault structure delineation using both geophysical measurements and soil-gas surveys. Seismic refraction and electrical resistivity tomography investigations were performed in com-bination with Direct Push (DP) soil gas concentration measurements, with the main objective being the char-acterization of an assumed permeable fault structure which is covered by sed...
The macroscopic behaviour of a fault zone can be described by a classic Coulomb friction law and static^kinetic rheology. The critical failure stress leading to the activation of a single shear zone segment then depends on the normal stress acting on the future fault plane. It is known that the seismic cycle on a main fault patch can be modulated by surrounding fault activations, leading to int...
The trifurcation area of the San Jacinto fault zone has produced more than 10% of all earthquakes in southern California since 2000, including the June 2016 Mw (moment magnitude) 5.2 Borrego Springs earthquake. In this area, the fault splits into three subparallel strands and is associated with broad VP /VS anomalies. We synthesize spatiotemporal properties of historical background seismicity a...
We use 2004–2011 Envisat synthetic aperture radar imagery and InSAR time series methods to estimate the contemporary rates of strain accumulation in the Chaman Fault system in Pakistan and Afghanistan.At29Nwefind long-termslip ratesof16 ± 2.3mm/yr for theGhazabandFault andof8 ± 3.1mm/yr for the Chaman Fault. This makes the Ghazaband Fault one of themost hazardous faults of the plate boundary zo...
We incorporate shear strain localization into spontaneous elastodynamic rupture simulations using a Shear Transformation Zone (STZ) friction law. In the STZ model, plastic strain in the granular fault gouge occurs in local regions called STZs. The number density of STZs is governed by an effective disorder temperature, and regions with elevated effective temperature have an increased strain rat...
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