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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Reef communities in the Dry Tortugas (Florida, USA): Baseline surveys for the new no-take area
To understand the current community structure on reefs in the Dry Tortugas, we conducted specieslevel surveys of macroalgae, coral diversity, herbivorous and game fishes, urchins, and substratum composition (e.g., rugosity) in shallow (3- to 5-m depth) low-relief reef and hardbottom habitats in October 2007. We had particular interest in the ecological process of herbivory inside and outside of th
Authors
I. B. Kuffner, V. J. Paul, R. Ritson-Williams, T. D. Hickey, L. J. Walters
Google earth mapping of damage from the Nigata-Ken-Chuetsu M6.6 earthquake of 16 July 2007
We describe the use of Google Earth during and after a large damaging earthquake thatstruck the central Japan coast on 16 July 2007 to collect and organize damage information and guide the reconnaissance activities. This software enabled greater real-time collaboration among scientists and engineers. After the field investigation, the Google Earth map is used as a final reporting product that was
Authors
Robert E. Kayen, WM. Clint Steele, Brian Collins, Kevin Walker
Recent damaging earthquakes in Japan, 2003-2008
During the last six years, from 2003-2008, Japan has been struck by three significant and damaging earthquakes: The most recent M6.6 Niigata Chuetsu Oki earthquake of July 16, 2007 off the coast of Kashiwazaki City, Japan; The M6.6 Niigata Chuetsu earthquake of October 23, 2004, located in Niigata Prefecture in the central Uonuma Hills; and the M8.0 Tokachi Oki Earthquake of September 26, 2003 eff
Authors
Robert E Kayen
Shear wave velocity investigation of soil liquefaction sites from the Tangshan, China M7.8 earthquake of 1976 using active and passive surface wave methods
An initial investigation of soil liquefaction sites from the July, 28 1976 Tangshan M7.8 earthquake was conducted between 1976 and 1978 by the National Ministry of Railways, China. These data are the basis of the ‘Chinese Method’ for assessment of liquefaction potential of silty-sand deposits, and are an important component of the worldwide data set for modern probabilistic methods for assessment
Authors
Robert E Kayen, Xiaxin Tao, Lijing Shi, Hailiang Shi
Physical properties of repressurized samples recovered during the 2006 National Gas Hydrate Program expedition offshore India
As part of an international cooperative research program, the U.S. Geological Survey (USGS) and researchers from the National Gas Hydrate Program (NGHP) of India are studying the physical properties of sediment recovered during the NGHP-01 cruise conducted offshore India during 2006. Here we report on index property, acoustic velocity, and triaxial shear test results for samples recovered from the
Authors
William J. Winters, William F. Waite, David H. Mason, P. Kumar
The future of coral reefs in the US Virgin Islands: Is Acropora palmata more likely to recover than Montastraea annularis complex?
Coral diseases have played a major role in the degradation of coral reefs in the Caribbean, including those in the US Virgin Islands (USVI). In 2005, bleaching affected reefs throughout the Caribbean, and was especially severe on USVI reefs. Some corals began to regain their color as water temperatures cooled, but an outbreak of disease (primarily white plague) led to losses of over 60% of the tot
Authors
Caroline S. Rogers, Erinn Muller, Tony Spitzack, Jeff Miller
Seismic monitoring to assess performance of structures In near‐real time: Recent progress
Earlier papers have described how observed data from classical accelerometers deployed in structures or from differential GPS with high sampling ratios deployed at roofs of tall buildings can be configured to establish seismic health monitoring of structures. In these configurations, drift ratios1 are the main parametric indicator of damage condition of a structure or component of a structure.Real
Authors
Mehmet Çelebi
Site characterization of Italian strong motion recording stations
A dataset of site conditions at 101 Italian ground motion stations with recorded motions has been compiled that includes geologic characteristics and seismic velocities. Geologic characterization is derived principally from local geologic investigations by ENEL that include detailed mapping and cross sections. For sites lacking such detailed geologic characterization, the geology maps of the by Se
Authors
Giuseppe Scasserra, Jonathan P. Stewart, Robert E. Kayen, Giuseppe Lanzo
Post-combustion CO2 capture: Let the microbes ruminate
No abstract available.
Authors
Gary D. Stricker, Romeo M. Flores, Margaret S. Ellis, Donald A. Klein
Laboratory and in situ tests for bioremediation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) by the dechlorinating consortium WBC-2
No abstract available.
Authors
Michelle M. Lorah, Eric Vogler, Phil Dennis, Duane Graves, Jose Gallegos
Hemlock ecosystem monitoring in southern West Virginia
We initiated a long-term hemlock ecosystem monitoring study in 1998 on the New River Gorge National River (NERI) and Gauley River National Recreation Area (GARI), in Nicholas, Fayette, and Raleigh counties, West Virginia, to quantify ecosystem response to invasion by the hemlock woolly adelgid (HWA). Hemlock vigor and degree of adelgid infestation were quantified in 1998-2007, vegetation structure
Authors
Petra Bohall Wood, John H. Perez, John M. Wood
Gathering, organizing, and accessing data for use in bird conservation across the Americas
The U.S. North American Bird Conservation Initiative (NABCI) Monitoring Subcommittee (2007) identified the need for a comprehensive plan for integrating and managing bird population monitoring data, and to adapt this as an integral component for improving monitoring activities across North America. While the Subcommittee provided a basic framework to begin development of this data management strat
Authors
Elizabeth Martin, Bruce G. Peterjohn, Steve Kelling