A5043901264- Seismic Waves and Analysis
- Landslides and related hazards
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Underwater Acoustics Research
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Seismology and Earthquake Studies
- Geology and Paleoclimatology Research
- Earthquake Detection and Analysis
- Ocean Waves and Remote Sensing
- Semantic Web and Ontologies
- Hydrology and Sediment Transport Processes
- Gait Recognition and Analysis
- Soil Geostatistics and Mapping
- Mineral Processing and Grinding
- Indoor and Outdoor Localization Technologies
- Spectroscopy and Chemometric Analyses
Sandia National Laboratories
2022-2025
Colorado State University
2015-2020
Soil maps derived from random or grid-based sampling schemes are often an important part of precision cropmanagement. Sampling and soil analysis to derive such require a large investment both time money. Aerialphotos have been used as mapping aid for years. Studies shown approach can be useful definingmanagement units in farming, but these studies limited single field, not entire farmingoperation. In this study, multispectral airborne [green, red, near infrared (NIR), thermal] satellite...
Abstract The resolution of distributed acoustic sensing (DAS) has allowed researchers to detect and analyze a wide variety seismic nonseismic sources, such as humans walking. Using preinstalled DAS fibers in telecommunication conduits near human communities makes detecting footstep sources nearly unavoidable. Researchers the environmental urban seismology fields see anthropogenic their signals interest. However, traditional seismologists may view them undesirable noise. Targeting or removing...
Abstract Flow and sediment transport dynamics in fluvial systems play critical roles shaping river morphology, the design use of riverine infrastructure, broader management watersheds. However, these properties are often difficult to measure comprehensively. Previous work has suggested proximal seismic signals resulting from flow bed load construct more complete records processes. We investigate a small (184 km 2 ; < 20 m 3 /s), snowmelt‐fed mountain Northern Colorado Rocky Mountains...
Abstract The Ross Ice Shelf (RIS) is host to a broadband, multimode seismic wavefield that excited in response atmospheric, oceanic and solid Earth source processes. A 34-station broadband seismographic network installed on the RIS from late 2014 through early 2017 produced continuous vibrational observations of Earth's largest ice shelf at both floating grounded locations. We characterize temporal spatial variations ambient power, with focus period bands associated primary (10–20 s)...
Abstract Seismic instruments such as broadband seismometers and distributed acoustic sensors (DAS) have a demonstrated potential for wide‐scale continuous in situ monitoring of near‐surface environmental anthropogenic processes. DAS is attractive development multi‐geophysical observatory due to the prevalence existing fiber infrastructure regions with environmental, cultural, or strategic significance. Here we present results from multi‐seasonal acquisition data on seafloor cable Beaufort...
Abstract The attenuation of ocean surface waves during seasonal ice cover is an important control on the evolution Arctic coastlines. spatial and temporal variations in this process have been challenging to resolve with conventional sampling using sparse arrays moorings or buoys. We demonstrate a novel method for persistent observation wave‐ice interactions distributed acoustic sensing (DAS) along existing seafloor fiber optic telecommunications cables. DAS measurements span 36‐km...
Abstract The Mackenzie Mountains EarthScope Project—a collaboration between Colorado State University, the University of Alaska, Michigan and Yukon College—deployed a roughly linear, 40-station broadband seismographic network. This network crossed actively deforming Northern Canadian Cordillera in Yukon, Canada; it also extended into Shield Northwest Territories, Canada. array was deployed July 2016 August 2018 (with four pilot stations installed 2015 three operating through 2019) coinciding...
ABSTRACT A typical seismic experiment involves installing 10–50 seismometers for 2–3 yr to record distant and local earthquakes, along with Earth’s ambient noise wavefield. The choice of the region is governed by scientific questions that may be addressed newly recorded data. In most experiments, not all stations data full expected duration. Data loss arise from defective equipment, improperly installed vandalism or theft, inadequate power sources, environmental disruptions (e.g., snow...
Abstract Monitoring sea ice extent is critical to understand long-term trends in climate change. Here, we show that ambient noise recorded by fiber-optic sensing technology deployed an Arctic shallow marine seafloor environment can track extent. We use a 37.4 km long section of cable offshore Oliktok Point, Alaska. Data are analyzed for two weeks: one July 2021 and another November 2021, when there incomplete evolving coverage. apply different Machine Learning algorithms identify types...
Abstract Observations of teleseismic earthquakes using broadband seismometers on the Ross Ice Shelf (RIS) must contend with environmental and structural processes that do not exist for land-sited seismometers. Important considerations are: (1) a broadband, multi-mode ambient wavefield excited by ocean gravity wave interactions ice shelf; (2) body reverberations produced seismic impedance contrasts at ice/water water/seafloor interfaces (3) decoupling solid Earth horizontal sub-shelf water...
The attenuation of ocean surface waves during seasonal ice cover is an important control on the evolution many Arctic coastlines. spatial and temporal variations in this process have been challenging to resolve with conventional sampling using sparse arrays moorings or buoys. We demonstrate a novel method for persistent observation wave-ice interactions distributed acoustic sensing (DAS) along existing seafloor telecommunications cables. DAS measurements span 36-km cross-shore cable Beaufort...