Natural Hazards

Publications

Filter Total Items: 5,629
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Year Published: 2019

Vertical coseismic offsets from differential high-resolution stereogrammetric DSMs: The 2013 Baluchistan, Pakistan earthquake

The recent proliferation of high-resolution (< 3-m spatial resolution) digital topography datasets opens a spectrum of geodetic applications in differential topography, including the quantification of coseismic vertical displacement fields. Most investigations of coseismic vertical displacements to date rely, in part, on pre- or post-event...

Barnhart, William D.; Gold, Ryan D.; Shea, Hannah N.; Peterson, Katherine E.; Briggs, Richard W.; Harbor, David J.

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Year Published: 2019

Jack Boatwright’s last science

In the months before he passed away, Jack Boatwright asked us to review a manuscript on source properties, specifically stress drop, of earthquakes in northeastern North America (NENA). This manuscript originated in research funded by the U.S. Nuclear Regulatory Commission (NRC), described in his final report to NRC and published as USGS Open-File...

Baltay, Annemarie S.; Hanks, Thomas C.

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Year Published: 2019

Radiometric ages of volcanic rocks on the fort rock dome and in the aquarius mountains, Yavapai and Mohave Counties, Arizona

The Fort Rock dome, in Yavapai County, Ariz., is a roughly circular geologic structure in plan view, 2.5 km in diameter, that is similar in many ways to an impact crater; however, it is a structural dome caused by a potassic mafic intrusion at depth, and the crater-like depression in its center is erosional in origin. The Aquarius Mountains, west...

Fuis, Gary S.; Calvert, Andrew T.; Sullivan, Katie
Fuis, G.S., Calvert, A., and Sullivan, K., 2019, Radiometric ages of volcanic rocks on the Fort Rock dome and in the Aquarius Mountains, Yavapai and Mohave counties, Arizona: U.S. Geological Survey Open-File Report 2019–1038, 18 p., https://doi.org/10.3133/ofr20191038.

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Year Published: 2019

Optimizing an inner-continental shelf geologic framework investigation through data repurposing and machine learning

The U.S. Geological Survey (USGS) and the National Oceanic Atmospheric Administration (NOAA) have collected approximately 5,400 km2 of geophysical and hydrographic data on the Atlantic continental shelf between Delaware and Virginia over the past decade and a half. Although originally acquired for different objectives, the comprehensive coverage...

Pendleton, Elizabeth A.; Brothers, Laura L.; Sweeney, Ed

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Year Published: 2019

Relationships between regional coastal land cover distributions and elevation reveal data uncertainty in a sea-level rise impacts model

Understanding land loss or resilience in response to sea-level rise (SLR) requires spatially extensive and continuous datasets to capture landscape variability. We investigate sensitivity and skill of a model that predicts dynamic response likelihood to SLR across the northeastern U.S. by exploring several data inputs and outcomes. Using...

Lentz, Erika E.; Plant, Nathaniel G.; Thieler, E. Robert

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Year Published: 2019

Assessing morphologic controls on atoll island alongshore sediment transport gradients due to future sea-level rise

Atoll islands’ alongshore sediment transport gradients depend on how island and reef morphology affect incident wave energy. It is unclear, though, how potential atoll morphologic configurations influence shoreline erosion and/or accretion patterns, and how these relationships will respond to future sea-level rise (SLR). Schematic atoll models...

Shope, James B.; Storlazzi, Curt D.

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Year Published: 2019

GLASS3: A standalone multi-scale seismic detection associator

The automated global real-time association of phase picks into seismic sources comes with unique challenges when simultaneously monitoring at local, regional and global scales. High spatial variability in seismic station density, transitory seismic data availability, and time-varying noise characteristics of individual stations must be considered...

Yeck, William L.; Patton, John; Johnson, Caryl E.; Kragness, David; Benz, Harley M.; Earle, Paul S.; Guy, Michelle; Ambruz, Nicholas (Contractor)

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Year Published: 2019

Seismological, geological, and geotechnical engineering aspects of the 2018 MW 6.6 Hokkaido Eastern Iburi earthquake

The 2018 Hokkaido Eastern Iburi MW6.6 earthquake struck the southern coast of the north island of Japan in the early morning (3:08 AM JST) on September 6, 2018. The event had a hypocentral depth of 35 km, centered beneath the port city of Tomakomai. Extremely strong shaking with peak ground acceleration in excess of 0.5 g was felt in the...

Kayen, Robert; Wham, Brad; Grant, Alex; Atsushi, Mikami; Anderson, Donald; Zimmaro, Paolo; Wang, Pengfei; Tsai, Yi Tyan; Bachhuber, Jeff; Madugo, Chris L M; Sun, Joseph; Hitchcock, Christopher S.; Motto, Matthew

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Year Published: 2019

Rapid station and network quality analysis for temporary deployments

Seismic station data quality is commonly defined by metrics such as data completeness or background seismic noise levels in specific frequency bands. However, for temporary networks such as aftershock deployments or induced seismicity monitoring, the most critical metric is often how well the station performs when recording events of interest. A...

Wilson, David C.; Ringler, Adam T.; Storm, Tyler; Anthony, Robert E.

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Year Published: 2019

Temperature mediates secondary dormancy in resting cysts of Pyrodinium bahamense (Dinophyceae)

High‐biomass blooms of the toxic dinoflagellate Pyrodinium bahamense occur most summers in Tampa Bay, Florida, USA, posing a recurring threat to ecosystem health. Like many dinoflagellates, P. bahamense forms immobile resting cysts that can be deposited on the seafloor—creating a seed bank that can retain the organism within...

Lopez, Cary B.; Karim, Aliza; Murasko, Susan; Marot, Marci E.; Smith, Christopher G.; Corcoran, Alina A.

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Year Published: 2019

Xenon hydrate as an analogue of methane hydrate in geologic systems out of thermodynamic equilibrium

Methane hydrate occurs naturally under pressure and temperature conditions that are not straightforward to replicate experimentally. Xenon has emerged as an attractive laboratory alternative to methane for studying hydrate formation and dissociation in multiphase systems, given that it forms hydrates under milder conditions. However, building...

Fu, Xiaojing; Waite, William F.; Cueto-Felgueroso, Luis; Juanes, Ruben

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Year Published: 2019

The USGS National crustal model for seismic hazard studies: 2019 update

The United States Geological Survey (USGS) National Crustal Model (NCM) is being developed to assist in the modeling of seismic hazards across the conterminous United States, specifically by improving estimates of site response. The NCM is composed of geophysical profiles, extending from the Earth’s surface into the upper mantle, constructed from...

Boyd, Oliver S.