A5086145218- earthquake and tectonic studies
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- High-pressure geophysics and materials
- Seismic Performance and Analysis
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geochemical Analysis
- Geotechnical and Geomechanical Engineering
- Landslides and related hazards
- Earthquake and Tsunami Effects
- Geotechnical Engineering and Underground Structures
- Geological Modeling and Analysis
- Transportation Safety and Impact Analysis
- Methane Hydrates and Related Phenomena
- Geochemistry and Geologic Mapping
- Carbon Dioxide Capture Technologies
- Atmospheric aerosols and clouds
- Engineering Applied Research
- Aerodynamics and Fluid Dynamics Research
- Adsorption and Cooling Systems
- Refrigeration and Air Conditioning Technologies
- Drilling and Well Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Solar Thermal and Photovoltaic Systems
Tianjin University
2016-2024
Shandong University of Political Science and Law
2024
San Diego State University
2012-2023
Beijing University of Chemical Technology
2023
Hubei University of Automotive Technology
2018-2019
Wuhan University of Technology
2018-2019
Wuhan Technical College of Communications
2018-2019
Université du Québec à Trois-Rivières
2019
University of California, Santa Barbara
2003-2018
Beihang University
2018
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,...
Research Article| April 04, 2018 A Suite of Exercises for Verifying Dynamic Earthquake Rupture Codes Ruth A. Harris; Harris aU.S. Geological Survey, 345 Middlefield Road, MS 977, Menlo Park, California 94025 U.S.A., harris@usgs.gov Search other works by this author on: GSW Google Scholar Michael Barall; Barall bInvisible Software Inc., P.O. Box 6541, San Jose, 95150 U.S.A. Brad Aagaard; Aagaard Shuo Ma; Ma cDepartment Sciences, Diego State University, Diego, 92182 Daniel Roten; Roten Kim...
Chiral carbon dots (C-dots) with a circularly polarized fluorescence (CPF) property have attracted tremendous attention due to their significant applications in chiral optoelectronics and theranostics. However, constructing room-temperature phosphorescent (CPRTP) C-dots remains great challenge. Herein, strategy is established achieve efficient CPF CPRTP emissions C-dots/chiral helical polymer bilayer composite film. Taking advantage of the filter effect polymer, intense large dissymmetric...
This study examines the rationale of Hilbert-Huang transform (HHT) for analyzing dynamic and earthquake motion recordings in studies seismology engineering. In particular, this paper first provides fundamentals HHT method, which consist empirical mode decomposition (EMD) Hilbert spectral analysis. It then uses to analyze hypothetical real wave motion, results are compared with obtained by Fourier data processing technique. The analysis two indicates that method is able extract some...
Abstract We simulate long-period ( T >1.0–2.0 s) and broadband >0.1 ground motions for 39 scenario earthquakes M w 6.7–7.2) involving the Hayward, Calaveras, Rodgers Creek faults. For rupture on Hayward fault, we consider effects of creep coseismic slip using two different approaches, both which reduce motions, compared with neglecting influence creep. Nevertheless, generate strong shaking throughout San Francisco Bay area, about 50% urban area experiencing modified Mercalli intensity VII...
Research Article| September 01, 2011 Verifying a Computational Method for Predicting Extreme Ground Motion 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. Search other works by this author on: GSW Google Scholar M. Barall; Barall 2Invisible Software D. J. Andrews; Andrews B. Duan; Duan 3Texas A&M S. Ma; Ma 4San Diego State University E. Dunham; Dunham 5Stanford A.-A. Gabriel; Gabriel 6ETH, Zurich...
Dip-slip faulting may juxtapose different geologic materials with differ- ent properties, such that a strong material contrast will naturally tend to form. Both the across fault and dip-slip motion on nonvertical lead normal stress variations during earthquake rupture. This variation significantly affect dynamic rupture propagation. To demonstrate this, we model propagation two-dimensional (2D), reverse, faults (30°, 45°, 60° dipping) 20% contrasts. For predominantly up-dip propagation, find...
We present an implementation of the perfectly matched layer (pml) absorbing boundary conditions and modeling intrinsic attenuation ( Q ) in explicit finite-element simulations wave propagation. The method uses one integration point hourglass control scheme, which leads to easy extension velocity-stress pml method. Numerical examples using both regular irregular elements region show excellent results: very few reflections are observed from for body waves surface waves—far superior classic...
Large dynamic stress off the fault incurs an inelastic response and energy loss, which contributes to fracture energy, limiting rupture slip velocity. Using explicit finite element method, we model three‐dimensional ruptures on a vertical strike‐slip in homogeneous half‐space. The material is subjected pressure‐dependent Drucker‐Prager yield criterion. Initial stresses medium increase linearly with depth. Our simulations show that confined narrowly at There strain induced by large associated...
I present a rigorous unifying interpretation of the well‐documented widespread near‐surface and fault zone damage induced by earthquakes simulating three‐dimensional dynamic rupture propagation on vertical strike‐slip fault. Stresses in crust are depth‐dependent material response is governed Drucker‐Prager yield criterion. show that yielding seismic waves under low confining pressure causes damage. Because increases with depth, at depth narrowly confined near fault, but its thickness...
We investigate the effects of large-scale surface topography on ground motions generated by nearby faulting. show a specific example studying effect San Gabriel Mountains, which are bounded Mojave segment Andreas fault north and Los Angeles Basin south. By si- mulating Mw 7.5 earthquake fault, we that Mountains act as natural seismic insulator for metropo- litan Angeles. The mountains scatters waves gen- erated rupture leading to less-efficient excitation basin-edge resonances within Basin....
Dynamic pore pressure changes in the overriding wedge above a shallow‐dipping plate interface significantly affect rupture dynamics of shallow subduction zone earthquakes and their tsunamigenesis. For on verge Coulomb failure everywhere including basal fault, dynamic increase due to up‐dip propagation leads widespread yielding within wedge, which is greatly enhanced by dip fault. The reduces stress drop, slip velocity, slip, giving rise prolonged duration, thus explaining many anomalous...
Abstract Elastic dislocation models require large near‐trench slip to explain tsunamigenesis, which is probably best exemplified in the 2011 M9 Tohoku earthquake. However, it puzzling that largest tsunami heights occurred about 100 km north of zone, where bathymetric surveys indicate no at trench or submarine landslides. Here we show coseismic yielding plentiful sediments northern Japan Trench margin can induce inelastic uplift landward from and diminish near trench. The scarcity south leads...
We present two spontaneous rupture models of the 2004 M w 6.0 Parkfield earthquake constrained by near‐source ground motions. start with a stress drop distribution calculated from kinematic slip distribution. Using linear slip‐weakening friction law, we utilize trial and error to obtain both conditions frictional parameters on fault that produce synthetics consistent records. The material contrast across San Andreas Fault is incorporated using different one‐dimensional velocity structures...
Abstract We correlate the vertical component of ambient seismic noise data recorded on 56 broadband stations with dense coverage in greater Los Angeles area to determine station-to-station Green’s functions. These functions provide an important test community velocity models (Southern California Earthquake Center [SCEC] CVM 4.0 and CVM-H 5.2) used for strong ground-motion prediction future scenario earthquakes southern California. Comparisons ambient-noise nearly 300 paths, those calculated...
Abstract Fault gouge deformation likely plays a significant role in controlling the strength of mature, large‐displacement faults. Experiments show that intact deforms an overall ductile and stable manner, readily compacting, but dilates experiences brittle failure under large strain rate. Inelastic compaction dilatancy are modeled here using combined Mohr‐Coulomb end‐cap yield criterion dynamic rupture model strike‐slip fault with strongly velocity‐weakening friction. We shear stress...
By modeling spontaneous ruptures, we study the mechanism dependence of radiated seismic energy from three hypothetical crustal events, 30° dipping reverse fault, 60° normal and a vertical strike‐slip 1994 blind‐thrust Northridge earthquake. Embedded in homogeneous half‐space, all faults have same area are subjected to shear stress conditions frictional parameters. Dynamic simulations produce apparent 0.53 MPa, 0.23 0.34 MPa for reverse, normal, faults, respectively. The distribution on...