A5058663704- earthquake and tectonic studies
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Hydraulic Fracturing and Reservoir Analysis
- Crystallography and molecular interactions
- Textile materials and evaluations
- Seismology and Earthquake Studies
- Drilling and Well Engineering
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Reinforcement Learning in Robotics
- Maritime and Coastal Archaeology
- Mechanical Behavior of Composites
- Geological Studies and Exploration
- Geophysics and Sensor Technology
- Reservoir Engineering and Simulation Methods
- Geological and Tectonic Studies in Latin America
- Geological and Geophysical Studies
- Machine Learning in Materials Science
- Data Visualization and Analytics
- Lignin and Wood Chemistry
Macquarie University
2017-2024
Public Dental Service Västra Götaland
2024
Region Västra Götaland
2024
University of New Mexico
2014-2018
Cooperative Institute for Research in Environmental Sciences
2014
University of Wyoming
2009-2013
Schlumberger (British Virgin Islands)
2006-2011
Wyoming Department of Education
2011
Brigham Young University
2004-2007
DuPont (United States)
1986-2005
The correspondence between seismic velocity anomalies in the crust and mantle differential incision of continental-scale Colorado River system suggests that significant mantle-to-surface interactions can take place deep within continental interiors. Rocky Mountain region exhibits low-seismic-velocity associated with atypically high (and rough) topography, steep normalized river segments, areas greatest incision. Thermochronologic geologic data show regional exhumation accelerated starting...
Research Article| June 01, 2016 Magma reservoirs from the upper crust to Moho inferred high-resolution Vp and Vs models beneath Mount St. Helens, Washington State, USA Eric Kiser; Kiser 1Department of Earth Science, Rice University, 6100 Main Street, MS-126, Houston, Texas 77005, Search for other works by this author on: GSW Google Scholar Imma Palomeras; Palomeras Alan Levander; Levander Colin Zelt; Zelt Steven Harder; Harder 2Department Geological Sciences, University at El Paso, 500 West...
Receiver functions recorded by the 54‐station 920 km long Program for Array Seismic Studies of Continental Lithosphere–Incorporated Research Institutions Seismology Colorado Plateau/Rio Grande Rift Transect Experiment (LA RISTRA) line array display a pervasive negative polarity P to S conversion (P d s) arrival preceding positive 410 discontinuity arrival. These arrivals are modeled as low‐velocity layer atop (410‐LVL) and inverted velocity profile via grid search using five‐parameter linear...
Abstract In the summer of 2014 a dense array 904 geophones was deployed at Mount St. Helens along road and trail system within 15 km distance summit crater. The recorded continuous data for approximately 2 weeks presents an unprecedented seismic observation active volcano. A reverse‐time imaging method is applied to short‐term‐average over long‐term‐average time series automatically detect locate microseismicity. These efforts resulted in order magnitude increase earthquake detections normal...
Support for the Colorado high topography is resolved using seismic data from Rocky Mountain (CRM) Experiment and Seismic Transects. The average crustal thickness, derived P wave receiver function imaging, 48 km. However, a negative correlation between Moho depth elevation observed, which negates Airy‐Heiskanen isostasy. Shallow (<45 km depth) found beneath some of highest elevations, therefore, CRM are rootless. Deep (45–51 km) regions indicate structure inherited Proterozoic assembly...
Abstract Mount St Helens is the most active volcano within Cascade arc; however, its location unusual because it lies 50 km west of main axis arc volcanism. Subduction zone thermal models indicate that down-going slab decoupled from overriding mantle wedge beneath forearc, resulting in a cold unlikely to generate melt. Consequently, forearc raises questions regarding extent and source region melts are responsible for Here using, high-resolution active-source seismic data, we show sits atop...
Abstract We present new 3‐D P wave and S velocity models of the upper 20 km Mount St. Helens (MSH) region. These were obtained using local‐source arrival time tomography from earthquakes explosions recorded at 70 broadband stations deployed as part imaging Magma Under (iMUSH) project augmented by several data sets. Principal features our include (1) low velocities along seismic zone to depths least corresponding high conductivity imaged iMUSH magnetotelluric studies. This delineates a...
Teleseismic receiver function analysis of data from six dense arrays in the western U.S. is used to investigate mantle transition zone (MTZ) discontinuities and prevalence a low-velocity layer atop 410 km discontinuity (410-LVL). Negative polarity Ps arrivals indicative with top 25–60 above are identified 8–11 out 18 stacks functions highly sampled back azimuth corridors. The 410-LVL interpreted as partial melt resulting upwelling hydrated across water solubility contrast at 410. 669 mean...
Abstract Measurements and mechanical models of heterogeneous bedload transport in rivers remain basic challenges for studies landscape evolution watershed management. A 700 m reach the Trinity River (northern California, USA), a large gravel-bed river, was instrumented with an array 76 seismographs during dam-controlled flood gravel augmentation to investigate potential out-of-stream monitoring. The temporal response constant discharge provides strong evidence seismic sensitivity aids...
Research Article| August 01, 2018 Focusing of melt near the top Mount St. Helens (USA) magma reservoir and its relationship to major volcanic eruptions Eric Kiser; Kiser * 1University Arizona, Department Geosciences, Tucson, Arizona 85721, USA *E-mail: ekiser@email.arizona.edu Search for other works by this author on: GSW Google Scholar Alan Levander; Levander 2Rice University, Earth, Environmental Planetary Sciences, Houston, Texas 77005, Colin Zelt; Zelt Brandon Schmandt; Schmandt...
We extend the receiver function deconvolution methodology of Bostock (2004) to S-wave functions and develop a method source spec- trum estimation constrain crustal structure across Archean-Proterozoic Cheyenne belt suture in southeast Wyoming using data from dense deployment seismic stations. are particularly useful because free- surface reverberations do not contaminated direct Sdp arrivals, image is able validate our P-wave image. P- images teleseismic tomogram find consistent with...
Learning to control an environment without hand-crafted rewards or expert data remains challenging and is at the frontier of reinforcement learning research. We present unsupervised algorithm train agents achieve perceptually-specified goals using only a stream observations actions. Our agent simultaneously learns goal-conditioned policy goal achievement reward function that measures how similar state state. This dual optimization leads co-operative game, giving rise learned reflects...
Abstract A method for scattered wave imaging in 3‐D with both teleseismic P and S receiver function data is introduced. The approach relies on body‐wave scattering kernels that are derived from the adjoint sensitivity which typically used full waveform tomography. forward problem approximated using ray theory, yielding a computationally efficient algorithm can resolve dipping discontinuous interfaces functions. Traveltime fields incident arrivals point‐sources obtained by solving Eikonal...
Agency is a system's capacity to steer outcomes toward goal, and central topic of study across biology, philosophy, cognitive science, artificial intelligence. Determining if system exhibits agency notoriously difficult question: Dennett (1989), for instance, highlights the puzzle determining which principles can decide whether rock, thermostat, or robot each possess agency. We here address this from viewpoint reinforcement learning by arguing that fundamentally frame-dependent: Any...
The scope, usability, limitations and predictive power of four modeling methodologies are analyzed in this paper: mathematical models, empirical computer simulation artificial neural network models. each the is estimated by comparing predicted yarn strength with experimentally obtained strengths for yarns spun using different process conditions material parameters.
A computer model is described that yielded results consistent with Instron stress- strain curves for both the machine and cross directions of various polyester, thermally point-bonded, nonwoven fabrics. Fiber bond tensile properties, layout, fabric density, fiber curl orientation were entered into computer, program followed evolution system as it was distorted under stress.