Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Colorado Delta riparian plant health improvement Colorado Delta riparian plant health improvement
The riparian corridor along Mexico’s arid Colorado River Delta is being affected by reduction in river flow and increases in heat, drought, human infrastructure, and disturbances. These disturbances can change riparian land cover by limiting water availability for riparian plant species, increasing fire intensity and frequency, and increasing soil and water salinities. In response to...
Authors
Pamela L. Nagler
A journey to the center of the USGS National Strong-motion Project processing and beyond A journey to the center of the USGS National Strong-motion Project processing and beyond
The United States Geological Survey (USGS) National Strong Motion Project (NSMP) has the primary U.S. government responsibility to acquire, process, and disseminate significant strong-motion earthquake ground motion records measured at surficial free-field stations, structures (buildings, dams, and bridges, and geotechnical arrays to the earthquake engineering community. As a result of...
Authors
Lisa Sue Schleicher, Jamison Haase Steidl, Eric M. Thompson, Alan K. Yong, Jeff Brody, James Luke Blair, Mike Hearne, Brad T. Aagaard, Susan E. Hough, Han Shao, Garet Huddleston, Keira Heilpern, Kristin Marano, Gabe Ferragut, B. Worden, David J. Wald, Jason De Cristofaro, Adria Ruth McClain, B. Dunham, D. Nget, J. Aragon, J. Gomez, V. Amador, V. Carrasco Rodriquez, E. E. Luna, D. Cembalski, D. Childs, J. Smith, D. Croker, L. Gee
Models no not provide proof: An example of model ambiguity and application of isotopic data in a mine pit lake Models no not provide proof: An example of model ambiguity and application of isotopic data in a mine pit lake
Geochemical and hydrologic models of pit lakes are commonly used in environmental regulatory decisions to predict future water quality and hydrologic conditions and to understand existing pit lakes. Models may be used to quantify sulfide oxidation, predict thermal/chemical stratification and mixing, and better understand connections between pit lakes and aquifers. One concern related to...
Authors
Connor P. Newman
Site-specific, extended ShakeMaps for earthquake engineering applications Site-specific, extended ShakeMaps for earthquake engineering applications
The U.S. Geological Survey (USGS) routinely produces ShakeMaps of shaking intensity across the globe. Due to practical constraints, the number of response spectral periods was limited to three standard periods (0.3, 1.0, and 3.0 sec). We have recently developed the tools that are necessary to expand this functionality to include 22 periods (matching the current U.S. National Seismic...
Authors
Eric M. Thompson, Mike Hearne, Charles Worden, Vince Quitoriano, Annabelle Elizabeth Cunningham, David J. Wald
Seasonal and spatial patterns in sediment transport in an erosional marsh system Seasonal and spatial patterns in sediment transport in an erosional marsh system
Salt marshes provide expansive ecosystem services to coastal regions, including serving as bird and fish habitat, providing flood protection, and sequestering carbon and toxins (Barbier et al. 2011). While marshes are naturally dynamic, they are undergoing net loss in the 21st century largely due to lateral erosion (Camp- bell et al. 2022). In regions where marsh migration is constrained...
Authors
Lukas T. WinklerPrins, Jessica R. Lacy, Mark T. Stacey, Karen M. Thorne
Separating signals in elevation data improves supervised machine learning predictions for hydrothermal favorability Separating signals in elevation data improves supervised machine learning predictions for hydrothermal favorability
A recent study identified topography (land surface elevation above sea level) as an important input dataset (feature) for predicting the location of hydrothermal systems in the Great Basin in Nevada. Yet, topography is generally a result of more than one geological process and may consequently contain multiple distinct signals. For example, the geologic evolution of the Great Basin has...
Authors
Pascal Domingo Caraccioli Salinas, Stanley Paul Mordensky, Jacob DeAngelo, Erick R. Burns, John Lipor
Effective site coefficients for the 2024 International Building Code (IBC) Effective site coefficients for the 2024 International Building Code (IBC)
The U.S. National Seismic Hazard Models (NSHMs), developed by the U.S. Geological Survey (USGS), have long been the scientific foundation of seismic design guidelines and have been used to compute design ground motions for construction of new buildings and retrofit of existing buildings in the United States and its territories. The 2018 NSHM is adopted by the 2024 International Building...
Authors
Sanaz Rezaeian, Nico Luco, Andrew James Makdisi, Henry Mason
The influence of pre-existing structures on geothermal springs: Inferences from potential field mapping in Surprise Valley, CA and other sites In the northwestern Great Basin The influence of pre-existing structures on geothermal springs: Inferences from potential field mapping in Surprise Valley, CA and other sites In the northwestern Great Basin
Surprise Valley, located in the northwestern Great Basin, is an asymmetric extensional basin that marks a major tectonic transition between the relatively un-extended volcanic Modoc Plateau to the west, and the Basin and Range to the east that has undergone 10-15% extension. In addition, it sits just north of the Walker Lane which accommodates up to 20% of dextral slip associated with...
Authors
Jonathan M.G. Glen, Tait E. Earney
Simulated ground-motion records for the seismic assessment of monumental masonry structures Simulated ground-motion records for the seismic assessment of monumental masonry structures
Earthquakes are natural disasters that can cause widespread devastation and loss of life. Simulated ground-motion records can be useful in regions with limited seismic stations or a history of damaging but infrequent earthquakes. This is especially true in areas with a high concentration of heritage masonry structures, which are especially susceptible to damage, as simulated records can...
Authors
Shaghayegh Karimzadeh, Marco F. Funari, Simon Szabó, S. M. Sajad Hussaini, Sanaz Rezaeian, Paulo B. Lourenço
Seismic response comparison of a historical masonry church subject to real and simulated ground motions Seismic response comparison of a historical masonry church subject to real and simulated ground motions
In recent years, advanced numerical models and high-performance computing have facilitated the utilization of ground motion time series in the assessment of the non-linear dynamic behavior of historic masonry structures. Since recorded accelerograms can be sparse for specific analysis conditions, stochastic ground motion simulations have become a viable alternative to overcome this...
Authors
S. M. Sajad Hussaini, Claudio Sebastiani, Monica Capasso, Valerio Sabbatini, Shaghayegh Karimzadeh, Sanaz Rezaeian, Silvia Santini, Paulo B. Lourenço
U.S. Geological Survey research and assessments supporting carbon dioxide removal U.S. Geological Survey research and assessments supporting carbon dioxide removal
Both carbon capture and storage (CCS) and carbon dioxide removal (CDR) are methods to limit future global temperature rise and ocean acidification. CCS sequesters (stores) carbon dioxide (CO2) captured from industrial sources thereby preventing the CO2 from reaching the atmosphere. The captured CO2 is injected into underground geologic reservoirs or is converted into stable industrial...
Authors
Peter D. Warwick, Madalyn S. Blondes, Judith Z. Drexler, Kevin D. Kroeger, Zhiliang Zhu
Managing basin-scale carbon sequestration: A tragedy of the commons approach Managing basin-scale carbon sequestration: A tragedy of the commons approach
The Tragedy of the Commons is a well studied problem in the literature of ecology, economics, and environmental policy which illustrates the deleterious consequences of managing common pool resources when individual and social incentives are misaligned. In this work, we apply a simple model of carbon sequestration in a deep saline aquifer by two neighboring geologic CO2 storage (GCS)...
Authors
Joseph E. Duggan, Jonathan D. Ogland-Hand, Steven T. Anderson, Richard S. Middleton