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DISPLACEMENT BASED SEISMIC DESIGN METHODS.

Description: A research effort was undertaken to determine the need for any changes to USNRC's seismic regulatory practice to reflect the move, in the earthquake engineering community, toward using expected displacement rather than force (or stress) as the basis for assessing design adequacy. The research explored the extent to which displacement based seismic design methods, such as given in FEMA 273, could be useful for reviewing nuclear power stations. Two structures common to nuclear power plants were c… more
Date: July 15, 2003
Creator: Hofmayer, C.; Miller, C.; Hwang, Y. & Costello, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Moment Magnitude Calibration for the Eastern Mediterranean Region from Broadband Regional Coda Envelopes

Description: The following is an overview of results from ROA01-32 that focuses on an empirical method of calibrating stable seismic source moment-rate spectra derived from regional coda envelopes using broadband stations. The main goal was to develop a regional magnitude methodology that had the following properties: (1) it is tied to an absolute scale and is thus unbiased and transportable; (2) it can be tied seamlessly to the well-established teleseismic and regional catalogs; (3) it is applicable to sma… more
Date: July 17, 2003
Creator: Mayeda, K; Eken, T; Hofstetter, A; Turkelli, N; O'Boyle, J; Orgulu, G et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Regional Body-Wave Corrections and Surface-Wave Tomography Models to Improve Discrimination

Description: Our identification research for the past several years has focused on the problem of correctly discriminating small-magnitude explosions from a background of earthquakes, mining tremors, and other events. Small magnitudes lead to an emphasis on regional waveforms. The goal is to reduce the variance within the population of each type of event, while increasing the separation between the explosions and the other event types. We address this problem for both broad categories of seismic waves, body… more
Date: July 18, 2003
Creator: Walter, W R; Pasyanos, M E; Rodgers, A J; Meyeda, K M & Sicherman, A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improving the Fundamental Understanding of Regional Seismic Signal Processing with a Unique Western U.S. Dataset

Description: This project has built a unique historic database of regional distance nuclear explosion, earthquake, and mine-related digital broadband seismograms for the western United States (US). The emphasis is on data from Lawrence Livermore National Laboratory (LLNL)-managed stations MNA, ELK, KNB and LAC that recorded many nuclear tests and nearby earthquakes in broadband digital form since 1980, along with a small number of earlier events that were digitized from tapes. Through the generous cooperati… more
Date: July 18, 2003
Creator: Walter, W. R.; Smith, K.; O'Boyle, J.; Hauk, T. F.; Ryall, F.; Ruppert, S. D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calibrating the MKAR array using transfer functions

Description: Developing regional discriminants (RDs) at any given seismic station requires a ground-truth database of waveforms from both earthquakes and explosions. Recently installed stations used for seismic monitoring have no single charge explosions on which to base discriminants. We have developed a procedure to map information from surrogate stations, having a long recording history, to newly installed operational stations. We investigated a method to compute transfer functions using known effective … more
Date: January 1, 2003
Creator: Renwald, M. D. (Marie D.); Taylor, S. R. (Steven R.) & Wallace, Terry C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Proceedings of the 25th Seismic Research Review -- Nuclear Explosion Monitoring: Building the Knowledge Base

Description: These proceedings contain papers prepared for the 25th Seismic Research Review -- Nuclear Explosion Monitoring: Building the Knowledge Base, held 23-25 September, 2003 in Tucson, Arizona. These papers represent the combined research related to ground-based nuclear explosion monitoring funded by the National Nuclear Security Administration (NNSA), Defense Threat Reduction Agency (DTRA), Air Force Research Laboratory (AFRL), US Army Space and Missile Defense Command, and other invited sponsors. T… more
Date: September 23, 2003
Creator: Chavez, Francesca C. & Mendius, E. Louise
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Rock Mechanics and Enhanced Geothermal Systems: A DOE-sponsored Workshop to Explore Research Needs

Description: This workshop on rock mechanics and enhanced geothermal systems (EGS) was held in Cambridge, Mass., on June 20-21 2003, before the Soil and Rock America 2003 International Conference at MIT. Its purpose was to bring together experts in the field of rock mechanics and geothermal systems to encourage innovative thinking, explore new ideas, and identify research needs in the areas of rock mechanics and rock engineering applied to enhanced geothermal systems. The agenda is shown in Appendix A. The … more
Date: October 1, 2003
Creator: Heuze, Francois; Smeallie, Peter; Elsworth, Derek & Renner, Joel L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Increasing Safety and Reducing Environmental Damage Risk from Aging High-Level Radioactive Waste Tanks

Description: There exists a paramount need for improved understanding the behavior of high-level nuclear waste containers and the impact on structural integrity in terms of leak tightness and mechanical stability. The current program aims to develop and verify models of crack growth in high level waste tanks under accidental overloads such as ground settlement, earthquakes and airplane crashes based on extending current fracture mechanics methods. While studies in fracture have advanced, the mechanics have … more
Date: June 1, 2003
Creator: Steffler, Eric D.; McClintock, Frank A.; Lam, Poh-Sang; Williamson, Richard L.; Lloyd, W. R. & Rashid, Mark M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2001 - 2002 Upper Three Runs Sequence of Earthquakes at the SRS, South Carolina

Description: On October 08, 2001 a small felt earthquake occurred near Upper Three Runs Creek in the north central area of the Savannah River Site, South Carolina. Seven very small aftershocks followed the main event with the last one occurring March 06, 2002. All activity occurred within a small area. Further analysis of collected data indicates a correlation of this low level seismic activity with a small northwest trending structure observed in detailed gravity and magnetic data. Both single event and co… more
Date: October 16, 2003
Creator: Stevenson, Donald A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydroacoustic Studies Using HydroCAM - Station-centric Integration of Models and Observations Quarterly Report No. 3 April 2003 - June 2003

Description: OAK A271 Hydroacoustic Studies Using HydroCAM - Station-centric Integration of Models and Observations Quarterly Report No. 3 April 2003 - June 2003. BBN's work from April through June of 2003 was focused on the testing and release of HydroCAM 4.0, development of HydroCAM 4.1 software, continued data collection and analysis, and initial preparations for the 2003 Seismic Research Review. HydroCAM 4.0 was released and sent to DOE and AFTAC on June 9. This is the first release of new software on t… more
Date: July 14, 2003
Creator: Pulli, Jay J. & Upton, Zachary M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Probability of Liquefaction for Pit Disassembly and Conversion Facility (PDCF) Site, Savannah River Site

Description: This report documents the probability of liquefaction (POL) for the Pit Disassembly and Conversion Facility (PDCF). The procedure for analysis of a critical layer of interest requires the following basic steps: (1) establish the probability of occurrence (POO) of ranges of 2.5 Hz bedrock motion based on a probabilistic seismic hazard assessment (PSHA); (2) define the critical layer that may be susceptible to liquefaction; (3) estimate distributions of cyclic stress ratio (CSR) (i.e., seismic de… more
Date: September 30, 2003
Creator: Lee, R.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Natural fracture characterization using passive seismic illumination

Description: The presence of natural fractures in reservoir rock can significantly enhance gas production, especially in tight gas formations. Any general knowledge of the existence, location, orientation, spatial density, and connectivity of natural fractures, as well as general reservoir structure, that can be obtained prior to active seismic acquisition and drilling can be exploited to identify key areas for subsequent higher resolution active seismic imaging. Current practices for estimating fracture pr… more
Date: January 8, 2003
Creator: Nihei, K.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bnl Prediction of Nupecs Field Model Tests of Npp Structures Subject to Small to Moderate Magnitude Earthquakes.

Description: As part of a verification test program for seismic analysis codes for NPP structures, the Nuclear Power Engineering Corporation (NUPEC) of Japan has conducted a series of field model test programs to ensure the adequacy of methodologies employed for seismic analyses of NPP structures. A collaborative program between the United States and Japan was developed to study seismic issues related to NPP applications. The US Nuclear Regulatory Commission (NRC) and its contractor, Brookhaven National Lab… more
Date: August 17, 2003
Creator: Xu, J.; Costantino, C.; Hofmayer, C.; Murphy, A. & Kitada, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydroacoustic Studies Using HydroCAM - Station-centric Integration of Models and Observations Quarterly Report No.4 July 2003 - September 2003

Description: OAK B272 Quarterly technical report summarizing BBN's efforts to improve DOE's hydroacoustic modeling and analysis capability for nuclear explosion monitoring. BBN's work during the third quarter of 2003 was focused on preparations for and participation in the 2003 Seismic Research Review Meeting, unit testing and bug fixes to HydroCAM 4.1, data collection and analysis, and procuring high-resolution bathymetric data. In an attempt to save money, BBN scaled back its labor in the third quarter, d… more
Date: October 13, 2003
Creator: Upton, Zachary, M. & Pulli, Jay, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recency of Faulting and Neotechtonic Framework in the Dixie Valley Geothermal Field and Other Geothermal Fields of the Basin and Range

Description: We studied the role that earthquake faults play in redistributing stresses within in the earths crust near geothermal fields. The geographic foci of our study were the sites of geothermal plants in Dixie Valley, Beowawe, and Bradys Hot Springs, Nevada. Our initial results show that the past history of earthquakes has redistributed stresses at these 3 sites in a manner to open and maintain fluid pathways critical for geothermal development. The approach developed here during our pilot study prov… more
Date: February 20, 2003
Creator: Wesnousky, Steven; Caskey, S. John & Bell, John W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydroacoustic Blockage Calibration for Discrimination

Description: The core focus of this hydroacoustic research is to develop a better understanding of hydroacoustic blockage to better predict those stations that can be used in discrimination analysis for any particular event. The research involves two approaches: (1) model-based assessment of blockage and (2) ground-truth data-based assessment of blockage. The goal is to reliably determine all hydroacoustic stations that can be brought to bear on a discrimination analysis from any event location in the world… more
Date: July 11, 2003
Creator: Harben, Philip E.; Matzel, Eric; Upton, Zachary & Pulli, Jay J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Time-Domain Pure-state Polarization Analysis of Surface Waves Traversing California

Description: A time-domain pure-state polarization analysis method is used to characterize surface waves traversing California parallel to the plate boundary. The method is applied to data recorded at four broadband stations in California from twenty-six large, shallow earthquakes which occurred since 1988, yielding polarization parameters such as the ellipticity, Euler angles, instantaneous periods, and wave incident azimuths. The earthquakes are located along the circum-Pacific margin and the ray paths cl… more
Date: November 4, 2003
Creator: Zhang, Jiajun; Walter, William R.; Lay, Thorne & Wu, Ru-Shan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Lawrence Livermore National Laboratory Probabilistic Seismic Hazard Codes Validation

Description: Probabilistic Seismic Hazard Analysis (PSHA) is a methodology that estimates the likelihood that various levels of earthquake-caused ground motion will be exceeded at a given location in a given future time-period. LLNL has been developing the methodology and codes in support of the Nuclear Regulatory Commission (NRC) needs for reviews of site licensing of nuclear power plants, since 1978. A number of existing computer codes have been validated and still can lead to ranges of hazard estimates i… more
Date: February 8, 2003
Creator: Savy, J B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bnl Prediction of Nupecs Field Model Tests of Npp Structures Subject to Small to Moderate Magnitude Earthquakes.

Description: As part of a verification test program for seismic analysis codes for NPP structures, the Nuclear Power Engineering Corporation (NUPEC) of Japan has conducted a series of field model test programs to ensure the adequacy of methodologies employed for seismic analyses of NPP structures. A collaborative program between the United States and Japan was developed to study seismic issues related to NPP applications. The US Nuclear Regulatory Commission (NRC) and its contractor, Brookhaven National Lab… more
Date: August 17, 2003
Creator: Xu, J.; Costantino, C.; Hofmayer, C.; Murphy, A. & Kitada, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Report (O1-ERD-051) Dynamic InSAR: Imaging Seismic Waves Remotely from Space

Description: The purpose of this LDRD project was to determine the feasibility of using InSAR (interferometric synthetic aperture radar) to image seismic waves remotely from space. If shown to be feasible, the long-term goal of this project would be to influence future SAR satellite missions and airborne SAR platforms to include a this new capability. This final report summarizes the accomplishments of the originally-planned 2-year project that was cut short to 1 year plus 2 months due to a funding priority… more
Date: February 7, 2003
Creator: Vincent, P.; Rodgers, A.; Dodge, D.; Zucca, J.; Schultz, C.; Walter, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Annual Hanford Seismic Report for Fiscal Year 2003

Description: This report describes the seismic activity in and around the Hanford Site during Fiscal year 2003. Hanford Seismic Monitoring provides an uninterrupted collection of high-quality raw and processed seismic data from the Hanford Seismic Network for the U.S. Department of Energy and its contractors. Hanford Seismic Monitoring also locates and identifies sources of seismic activity and monitors changes in the historical pattern of seismic activity at the Hanford Site. The data are compiled, archive… more
Date: December 1, 2003
Creator: Hartshorn, Donald C.; Reidel, Steve P. & Rohay, Alan C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulation of Regional Explosion S-Phases (SiRES) Project

Description: Seismic monitoring aims to locate and identify all events that generate elastic waves in the solid earth. Amplitudes and arrival-times of seismic phases are commonly exploited to accomplish these goals. For large events that produce strong body and surface waves out to 90{sup o}, events can be accurately located and the Ms/m{sub b} discriminant can be used to distinguish earthquakes from explosions. As event yield/magnitude decreases, the probability of detecting signals at distant stations dim… more
Date: July 1, 2003
Creator: Myers, Stephen C.; Wagner, Jeffrey; Larsen, Shawn; Rodgers, Arthur; Mayeda, Kevin; Smith, Kenneth et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Southern California Earthquake Center - SCEC1: Final Report Summary Alternative Earthquake Source Characterization for the Los Angeles Region

Description: The objective my research has been to synthesize current understanding of the tectonics and faults of the Los Angeles Basin and surrounding region to quantify uncertainty in the characterization of earthquake sources used for geologically- and geodetically-based regional earthquake likelihood models. This work has focused on capturing epistemic uncertainty; i.e. uncertainty stemming from ignorance of the true characteristics of the active faults in the region and of the tectonic forces that dri… more
Date: February 26, 2003
Creator: Foxall, B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Third Quarter Hanford Seismic report for Fiscal year 2003

Description: Hanford Seismic Monitoring provides an uninterrupted collection of high-quality raw and processed seismic data from the Hanford Seismic Network for the U.S. Department of Energy and its contractors. Hanford Seismic Monitoring also locates and identifies sources of seismic activity and monitors changes in the historical pattern of seismic activity at the Hanford Site. The data are compiled, archived, and published for use by the Hanford Site for waste management, Natural Phenomena Hazards assess… more
Date: September 11, 2003
Creator: Hartshorn, Donald C.; Reidel, Steve P. & Rohay, Alan C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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