... deformation structure thrust reverse fault pop-up structure pop-down structure mountain range intramontane basin foreland basin The evolution of mountainous and foothill regions is largely determined by the stress field. This leads to the assumption that stresses largely determine the features...

... to the existence of fractional-derivative stress-strain relations with less than one Caputo fractional derivative and the heterogeneous of earth’s materials, there are great challenges in maintaining numerical accuracy and efficiency. To address these challenges, we develop an efficient short memory algorithm...

... with a mean maximum horizontal stress azimuth of 98°N. A total of 131 natural fractures are interpreted from acoustic image logs. These fractures have dominantly east–west strikes, with the true dips ranging between 51° and 80° toward north and south. Critically stressed fracture analysis exhibits the onset...

...Brian Kilgore; N. M. Beeler ABSTRACT During frictional failure experiments, high sample rate slip, stress, and slip velocity measurements were used to determine seismic source properties. The experiments were conducted over a range of coseismic total energy release. Near‐field measurements were...

..., the apparent stress shows an ostensible inverse correlation with the seismic moment. The apparent stress from the northern to the central regions of the GoC varies between 0.0005 and 0.4 MPa. We observed that earthquakes with lower and higher apparent stress tend to concentrate in regions with normal...

...Feng Youliang; Wu Longyun Abstract In order to investigate the distribution patterns of in situ stress in the main coal seams (3 # and 15 # ) of the Qinshui coalfield, an in-depth analysis was conducted on the in situ stress measurement results obtained from 139 measurement points across 46 mines...

... and fractures. Finally, we combined the multiscale identification results with precise earthquake locations to determine the seismogenic structures. The study found that stress perturbations within the HUGS field induce seismic activity along pre‐existing faults and small‐scale fractures, influencing...

... on the reliability and interpretability of the automated measurements. Most fast‐wave polarization directions align with the regional maximum horizontal stress and the nearby fault trends, generally consistent with previous observations. Five stations near the Zemuhe and Xiaojiang faults show a nearly 90° flip...

...Olaf Zielke; P. Martin Mai ABSTRACT The nonplanar geometry of faults influences their seismotectonic behavior, affecting the initiation, propagation, and termination of individual earthquakes as well as the stress–slip relationship and probability of multisegment rupture. Consequently, computer...

... the fault transition zone formed by the Doruneh and Herat fault systems; this area is primarily influenced by compressional stress from northeastern Iran. We used Interferometric Synthetic Aperture Radar to obtain the coseismic deformation of the earthquake sequence. Coseismic surface deformation in both...

...Giovanna Calderoni; Rachel E. Abercrombie ABSTRACT Stress drop is a fundamental parameter in ground‐motion modeling and seismic hazard assessment, but spectral estimates are subject to considerable uncertainties. A variety of factors cause different methods to yield different results, including...

... and branched faults were conducted to confirm the accuracy of BIEM_CH. The BIEM is employed in the simulation of dynamic rupture propagation, for which the fault plane is discretized into N triangular (unstructured) or square (structured) meshes. The stress at the m th mesh at the p th timestep can...

... BY 4.0). An underground energy storage chamber is a subterranean facility designed for energy storage. Its design and construction must consider rock mechanics, geological conditions, and engineering techniques to ensure safety and long-term stability [ 1 - 3 ]. The stress conditions...

... environment. Among the important but not yet fully answered questions are: (1) what are the temporal and spatial changes in stress and pore pressure in response to fluid injection and production, and (2) how do these changes relate to slip on preexisting faults and surface deformation? We simulate stress...

... and safety of rock engineering projects. In this study, we report on laboratory experiments to investigate the response of simulated faults. These experiments involved the use of bare granite surfaces to mimic fault behavior, while considering various initial stress ratios and applied normal disturbance...

... remains uncertain. To bridge this research gap, we conduct an experimental investigation on simulated faults in granite under CNS conditions. Our analysis focus on the influence of the displacement loading rate on the spatial and temporal evolution of local stresses along the fault and the size...

...Chen Ji; Ralph J. Archuleta; Aaron Peyton ABSTRACT Characterizing the information in earthquake source spectra requires three measures: seismic moment M 0 , apparent stress σ a , and stress parameter Δ σ B . We estimate σ a and Δ σ B for 42 Ridgecrest, California, earthquakes ( 4.0 ≤ M w ≤ 5.4...

...Jiaxin Yu; Per Avseth; Kenneth Duffaut ABSTRACT In seismic rock physics, models typically assume rocks are normally consolidated, often neglecting the effects of overconsolidation. Recent studies reveal that overconsolidated sands, resulting from stress release, show different physical property...

... present the first detailed description of this economically significant deposit. We find that an interplay between rheological architecture, varying stress field, and hydrothermal fluid pressure significantly influenced the orientation, grade, and endowment of mineralization. Three discrete generations...

...Peter Hennings; Katie M. Smye ABSTRACT Unconventional hydrocarbon development in the Permian Basin has required disposal of approximately 45 billion bbl of coproduced wastewater since 2009. This injection has altered subsurface stress and caused the widespread development of earthquakes...