Conference Papers
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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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ShakeMap Atlas 2.0: an improved suite of recent historical earthquake ShakeMaps for global hazard analyses and loss model calibration
We introduce the second version of the U.S. Geological Survey ShakeMap Atlas, which is an openly-available compilation of nearly 8,000 ShakeMaps of the most significant global earthquakes between 1973 and 2011. This revision of the Atlas includes: (1) a new version of the ShakeMap software that improves data usage and uncertainty estimations; (2) an updated earthquake source catalogue that include
Authors
D. Garcia, R.T. Mah, K. L. Johnson, M.G. Hearne, K. D. Marano, K.-W. Lin, D. J. Wald
The effects of feral cats on insular wildlife: the Club-Med syndrome
Domestic cats have been introduced to many of the world‘s islands where
they have been particularly devastating to insular wildlife which, in most
cases, evolved in the absence of terrestrial predatory mammals and feline
diseases. We review the effects of predation, feline diseases, and the life
history characteristics of feral cats and their prey that have contributed to the
extirpation and
Authors
Steve C. Hess, Raymond M. Danner
The GED4GEM project: development of a Global Exposure Database for the Global Earthquake Model initiative
In order to quantify earthquake risk of any selected region or a country of the world within the Global Earthquake Model (GEM) framework (www.globalquakemodel.org/), a systematic compilation of building inventory and population exposure is indispensable. Through the consortium of leading institutions and by engaging the domain-experts from multiple countries, the GED4GEM project has been working t
Authors
P. Gamba, D. Cavalca, K. S. Jaiswal, C. Huyck, H. Crowley
Time lapse photography as an approach to understanding glide avalanche activity
Avalanches resulting from glide cracks are notoriously difficult to forecast, but are a recurring problem for numerous avalanche forecasting programs. In some cases glide cracks are observed to open and then melt away in situ. In other cases, they open and then fail catastrophically as large, full-depth avalanches. Our understanding and management of these phenomena are currently limited. It is th
Authors
Jordy Hendrikx, Erich H. Peitzsch, Daniel B. Fagre
Timing of wet snow avalanche activity: An analysis from Glacier National Park, Montana, USA.
Wet snow avalanches pose a problem for annual spring road opening operations along the Going-to-the-Sun Road (GTSR) in Glacier National Park, Montana, USA. A suite of meteorological metrics and snow observations has been used to forecast for wet slab and glide avalanche activity. However, the timing of spring wet slab and glide avalanches is a difficult process to forecast and requires new capabil
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre
Ultra-high resolution four dimensional geodetic imaging of engineered structures for stability assessment
We used ground-based Tripod LiDAR (T-LiDAR) to assess the stability of two engineered structures: a bridge spanning the San Andreas fault following the M6.0 Parkfield earthquake in Central California and a newly built coastal breakwater located at the Kaumālapa`u Harbor Lana'i, Hawaii. In the 10 weeks following the earthquake, we found that the surface under the bridge shifted 7.1 cm with an addit
Authors
Gerald W. Bawden, Sandra Bond, J. H. Podoski, O. Kreylos, L. H. Kellogg
Use of electromagnetic induction methods to monitor remediation at the University of Connecticut landfill: 2004–2011
Time‐lapse geophysical surveys using frequency‐domain electromagnetics (FDEM) can indirectly measure time‐varying hydrologic parameters such as fluid saturation or solute concentration. Monitoring of these processes provides insight into aquifer properties and the effectiveness of constructed controls (such as leachate interceptor trenches), as well as aquifer responses to natural or induced stres
Authors
Carole D. Johnson, Eric A. White, Peter K. Joesten
VS30 – A site-characterization parameter for use in building Codes, simplified earthquake resistant design, GMPEs, and ShakeMaps
VS30, defined as the average seismic shear-wave velocity from the surface to a depth of 30 meters, has found wide-spread use as a parameter to characterize site response for simplified earthquake resistant design as implemented in building codes worldwide. VS30 , as initially introduced by the author for the US 1994 NEHRP Building Code, provides unambiguous definitions of site classes and site coe
Authors
Roger D. Borcherdt
Nearshore bathymetric evolution on a high-energy beach during the 2009-10 El Nino winter
The nearshore bathymetric evolution of a high-energy beach at the mouth of San Francisco Bay, California (USA), was tracked before, during, and after the powerful El Niño winter of 2009-10 to quantify alongshore bar formation and migration as well as the magnitude and alongshore variability of cross-shore transport. The observed deep-water winter wave energy was among the highest ever recorded in
Authors
Patrick L. Barnard, Daniel J. Hoover, Jeffrey A. Hansen
A transect across the basement massifs of the central Green Mountains, Vermont
No abstract available.
Authors
Gregory J. Walsh, Nicholas M. Ratcliffe, Michael J. Kunk
The role of backbarrier infilling in the formation of barrier island systems
Barrier islands develop through a variety of processes, including spit accretion, barrier elongation, and inlet filling. New geophysical and sedimentological data provide a means of documenting the presence of a paleoinlet within a barrier lithosome in the western Gulf of Maine, illuminating the process of backbarrier infilling and its effect on barrier and tidal inlet morphodynamics. The transpor
Authors
Christopher J. Hein, Duncan M. FitzGerald, Emily A. Carruthers, Byron D. Stone, Allen M. Gontz