A5100629036- earthquake and tectonic studies
- High-pressure geophysics and materials
- Seismology and Earthquake Studies
- Geological and Geochemical Analysis
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Climate variability and models
- Hydraulic Fracturing and Reservoir Analysis
- Earthquake Detection and Analysis
- Methane Hydrates and Related Phenomena
- Domain Adaptation and Few-Shot Learning
- Landslides and related hazards
- Multimodal Machine Learning Applications
- Geological Modeling and Analysis
- Remote Sensing and Land Use
- Precipitation Measurement and Analysis
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Force Microscopy Techniques and Applications
- Atmospheric and Environmental Gas Dynamics
- Seismic Performance and Analysis
- Cancer-related molecular mechanisms research
- Rock Mechanics and Modeling
Institute of Tibetan Plateau Research
2022-2025
Chinese Academy of Sciences
2022-2025
Qingdao University of Science and Technology
2023-2025
Chengdu University of Information Technology
2024
Chinese Academy of Meteorological Sciences
2024
University of Gothenburg
2024
Peking University
2024
Northwest Institute of Eco-Environment and Resources
2024
University of Chinese Academy of Sciences
2022-2024
McGill University
2015-2024
Aseismic deformation transients can emerge as a natural outcome of the rate and state friction processes revealed in laboratory fault‐sliding experiments. When that constitutive formulation is applied to model subduction earthquake sequences, arise spontaneously for certain effective stress ( ) variations with depth. We show if interstitial fluids are present pore pressure near‐lithostatic around downdip from frictional stability transition, recurrence intervals ∼1 year predicted on basis...
Research Article| March 30, 2016 Hydraulic Fracturing and Seismicity in the Western Canada Sedimentary Basin Gail M. Atkinson; Atkinson aDepartment of Earth Sciences, University, London, Ontario, N6A 5B7gmatkinson@aol.com Search for other works by this author on: GSW Google Scholar David W. Eaton; Eaton bDepartment Geoscience, University Calgary, Alberta, 2N 1N4eatond@ucalgary.ca Hadi Ghofrani; Ghofrani Dan Walker; Walker cBritish Columbia Oil Gas Commission, Victoria, British Columbia, 8W...
To investigate the possible physical mechanisms of recently observed aseismic slip events in Cascadia, Japan and Mexico subduction zones, we apply a Dieterich‐Ruina rate state friction law to three dimensional model shallow fault. That is loaded by imposed steady plate far downdip along thrust interface. Friction properties are temperature hence depth‐dependent, such that sliding stable at depths below about 30 km. The system perturbed into significantly nonuniform mode strike introducing...
Research Article| January 01, 2009 The SCEC/USGS Dynamic Earthquake Rupture Code Verification Exercise R. A. Harris; Harris * U.S. Geological Survey Mail Stop 977 345 Middlefield Road Menlo Park, California 94025 U.S.A. harris@usgs.gov (R. H.) 1U.S. Survey, California, Search for other works by this author on: GSW Google Scholar M. Barall; Barall 2Invisible Software, San Jose, Archuleta; Archuleta 3University of Santa Barbara, E. Dunham; Dunham 4Harvard University, Cambridge, Massachusetts,...
We present prompt distribution learning for effectively adapting a pre-trained vision-language model to address downstream recognition tasks. Our method not only learns low-bias prompts from few samples but also captures the of diverse handle varying visual representations. In this way, we provide high-quality task-related content facilitating recognition. This is realized by an efficient approach that output embeddings instead input embeddings. Thus, can employ Gaussian them and derive...
Abstract The Crooked Lake area in Central Alberta, Canada, became seismically active December 2013 with a sequence of earthquakes M w 2.0 and higher. are suspected to be induced by hydraulic fracturing nearby horizontal wells due their strong spatiotemporal correlation. To investigate the physical mechanism seismicity near Lake, we calculate stress pore pressure perturbations resulting from high‐rate multistage fluid injection framework linear poroelasticity. calculated used for seismic risk...
Abstract We use GPS and interferometric synthetic aperture radar (InSAR) measurements to image the spatial variation of interseismic coupling on Xianshuihe‐Anninghe‐Zemuhe (XAZ) fault system. A new 3‐D viscoelastic deformation model is developed infer rotation strain rates blocks, postseismic relaxation, slip deficit surface discretized with triangular dislocation patches. The inversions data show that optimal weight ratio smoothing factor are both 1. successive joint geodetic different...
Abstract Earthquake source mechanisms and spectra can provide important clues to aid in discriminating between natural induced events. In this study, we calculate moment tensors stress drop values for eight recent earthquakes the Western Canadian Sedimentary Basin with magnitudes 3.2 4.4, as well a nearby magnitude 5.3 event that is interpreted earthquake. We full tensor solutions by performing waveform‐fitting procedure based on 1‐D transversely isotropic velocity model. addition dominant...
Abstract Dynamic modeling of sequences earthquakes and aseismic slip (SEAS) provides a self‐consistent, physics‐based framework to connect, interpret, predict diverse geophysical observations across spatial temporal scales. Amid growing applications SEAS models, numerical code verification is essential ensure reliable simulation results but often infeasible due the lack analytical solutions. Here, we develop two benchmarks for three‐dimensional (3D) problems compare verify codes based on...
For episodic slow slip transients in subduction zones, a large uncertainty comparing surface deformations predicted by forward modeling based on rate and state friction to GPS measurements lies our limited knowledge of the frictional properties fluid pore pressure along shallow faults. In this study, we apply laboratory data granite gabbro gouges under hydrothermal conditions Cascadia‐like 2‐D model produce spontaneous aseismic transients, compare resulting intertransient transient...
In the vicinity of episodic aseismic transients in several subduction zones, presence interstitial fluids and near‐lithostatic pore pressure has been proposed to interpret seismic observations high P S wave speed ratio Poisson's ratio. Under such conditions, fault stabilization by dilatancy‐induced suction during increased shear strain rates becomes very efficient. We analyze frictional hydraulic conditions for spontaneous on a fluid‐infiltrated including dilatancy compaction framework rate...
Abstract We have numerically simulated dynamic ruptures along a “slip‐weakening” megathrust fault with subducted seamount of realistic geometry, demonstrating that seamounts can act as barrier to earthquake ruptures. Such effect is calculated be stronger for increased normal stress relative the ambient level, larger height‐to‐width ratio, and shorter seamount‐to‐nucleation distance. As height increases from 0 40% its basal width, required increase in effective on stop drops by much ~20%....
Subducted seamounts have been linked to interplate earthquakes, but their specific effects on earthquake mechanism remain controversial. A key question is under what conditions a subducted seamount will generate or stop megathrust earthquakes. Here we show results from numerical experiments in the framework of rate‐ and state‐dependent friction law which characterized as patch elevated effective normal stress thrust interface. We find that whether impede earthquakes depends critically...
Abstract Slow slip events (SSEs) are identified as the quasi‐stable fault deformation in deep transition zone from locked to continuous sliding many subduction zones. In well‐instrumented Cascadia margin, a class of M w 6.0 slow arise beneath Port Angeles every ∼14 months, inferred two decades geodetic monitoring. The along‐strike bending incoming oceanic plate north Washington is unique geometric feature whose influence on processes still unknown. Here we incorporate realistic geometry...
Abstract Numerical simulations of sequences earthquakes and aseismic slip (SEAS) have made great progress over past decades to address important questions in earthquake physics. However, significant challenges SEAS modeling remain resolving multiscale interactions between nucleation, dynamic rupture, slip, understanding physical factors controlling observables such as seismicity ground deformation. The increasing complexity calls for extensive efforts verify codes advance these with rigor,...
Abstract We use a sequence of induced earthquakes near Crooked Lake, Alberta, to investigate the physical differences between and tectonic earthquakes. Starting with Natural Resources Canada earthquake catalogue, we spectral ratio method calculate static stress drops group relocated ranging from December 2013 June 2015. find that fall within high side typical reported range events show no correlation magnitude, depth, or distance well. The appear roughly constant for M w 3 4. Relocated...
Abstract Source processes of injection‐induced earthquakes involve complex fluid‐rock interaction often elusive to regional seismic monitoring. Here we combine observations from a local seismograph array in the Montney Formation, northeast British Columbia, and stress modeling examine spatiotemporal evolution 30 November 2018 M w 4.2 (M L 4.5) hydraulic fracturing‐induced earthquake sequence. The isolated occurrence mainshock at depth ∼ 4.5 km crystalline basement 2 days following injection...
ABSTRACT Numerical modeling of earthquake dynamics and derived insight for seismic hazard relies on credible, reproducible model results. The sequences earthquakes aseismic slip (SEAS) initiative has set out to facilitate community code comparisons, verify advance the next generation physics-based models that reproduce all phases cycle. With goal advancing SEAS robustly incorporate physical geometrical complexities, here we present comparison results from two new benchmark problems: BP1-FD...
Abstract The Yarlung Zsangbo Grand Canyon (YGC) is an important pathway for water vapor transport from southern Asia to the Tibetan Plateau (TP). This area exhibits one of highest frequencies convective activity in China, and precipitation often induces natural disasters local communities, which can dramatically affect their livelihoods. In addition, produced gives rise vast glaciers large rivers around YGC. 2018, Second Scientific Expedition Research Program tasked a research team conduct...
Abstract Over 1000 earthquakes struck the northwest of Kangding on Xianshuihe fault in southwest China between 22 and 29 November 2014, including two largest events M w 5.9 5.6. The hypocenters 799 relocated suggest that independent main shock‐aftershock subsequences occurred Selaha Zheduotang branches fault, respectively. Fault slip inversion results from one interferometric synthetic aperture radar (InSAR) interferogram (26 September 2014 to 5 December 2014) show shock produced a maximum...