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Experimental Validation of LLNL Finite Element Codes for Nonlinear Seismic Simulations (Progress, Year 1 of 2)

Description: Shake table tests were performed on a full-scale 7-story slice of a reinforced concrete building at UC San Diego between October 2005 and January 2006. The tests were performed on the NEES Large High-Performance Outdoor Shake Table (LHPOST) at the Engelkirk Structural Engineering Center of UCSD. The structure was subjected to four uniaxial earthquake ground motions of increasing amplitude. The accelerations measured at the base of the structure and the measured roof displacements have been prov… more
Date: December 6, 2006
Creator: Alves, S W & Noble, C R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Review of the Stability Analysis for the Lanl Bsl-3 Building Foundation

Description: This work was performed upon request from Dr. Richard Thorpe from NNSA after his review of the LANL report on BSL-3 seismic stability [1]. The authors also reviewed report [1] and concluded, as did Dr. Thorpe, that the stability analysis was inappropriate. There are several reasons for that conclusion: (1) the assumption of a circular failure surface through the combined fill-and-rock foundation does not recognize the geologic structure involved. (2) the assumption of an equivalent static force… more
Date: November 30, 2006
Creator: Heuze, F. E. & Wagoner, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geologyy of the Yucca Mountain Site Area, Southwestern Nevada, Chapter in Stuckless, J.S., ED., Yucca Mountain, Nevada - A Proposed Geologic Repository for High-Level Radioactive Waste (Volume 1)

Description: Yucca Mountain in southwestern Nevada is a prominent, irregularly shaped upland formed by a thick apron of Miocene pyroclastic-flow and fallout tephra deposits, with minor lava flows, that was segmented by through-going, large-displacement normal faults into a series of north-trending, eastwardly tilted structural blocks. The principal volcanic-rock units are the Tiva Canyon and Topopah Spring Tuffs of the Paintbrush Group, which consist of volumetrically large eruptive sequences derived from c… more
Date: September 25, 2006
Creator: Keefer, W.R.; Whitney, J.W. & Buesch, D.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Proceedings of the 28th Seismic Research Review: Ground-Based Nuclear Explosion Monitoring Technologies

Description: These proceedings contain papers prepared for the 28th Seismic Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, held 19-21 September, 2006 in Orlando, Florida. These papers represent the combined research related to ground-based nuclear explosion monitoring funded by the National Nuclear Security Administration (NNSA), Air Force Technical Applications Center (AFTAC), Air Force Research Laboratory (AFRL), US Army Space and Missile Defense Command, Comprehensive Nuclear-Te… more
Date: September 19, 2006
Creator: Wetovsky, Marvin A.; Benson, Jody & Patterson, Eileen F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

INL Seismic Monitoring Annual Report: January 1, 2005 - December 31, 2005

Description: During 2005, the Idaho National Laboratory (INL) recorded 2390 independent triggers from earthquakes both within the region and from around the world. 38 small to moderate size earthquakes ranging in magnitude from 3.0 to 5.7 occurred within and outside the 161-km (100-mile) radius of INL. Earthquakes activity occurred in areas that have experienced seismic activity in the past, the Basin and Range northwest of the INL, southwestern Montana, Yellowstone Park, Wyoming, Jackson, Wyoming, and sout… more
Date: September 1, 2006
Creator: Payne, S. J.; Holland, A. A.; Hodges, J. M. & Berg, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optomechanical considerations for the VISAR diagnostic at the National Ignition Facility (NIF)

Description: The National Ignition Facility (NIF) requires optical diagnostics for measuring shock velocities in shock physics experiments. The velocity interferometer for any reflector measures shock velocities at a location remote to the NIF target chamber. Our team designed two systems, one for a polar port orientation, and the other to accommodate two equatorial ports. The polar-oriented design requires a 48-m optical relay to move the light from inside the target chamber to a separately housed measurem… more
Date: September 1, 2006
Creator: Kaufman, Morris I.; Celeste, John R.; Frogget, Brent C.; Lee, Tony L.; GacGowan, Brian J.; Malone, Robert M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Crustal Structure of Iraq from Receiver Functions and Surface Wave Dispersion

Description: We report the crustal structure of Iraq, located in the northeastern Arabian plate, estimated by joint inversion of P-wave receiver functions and surface wave group velocity dispersion. Receiver functions were computed from teleseismic recordings at two temporary broadband seismic stations in Mosul (MSL) and Baghdad (BHD), separated by approximately 360 km. Group velocity dispersion curves at the sites were derived from continental-scale tomography of Pasyanos (2006). The inversion results show… more
Date: August 31, 2006
Creator: Gok, Rengin; Mahdi, Hanan; Al-Shukri, Haydar & Rodgers, Arthur J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Model-Based Signal Processing: Correlation Detection With Synthetic Seismograms

Description: Recent applications of correlation methods to seismological problems illustrate the power of coherent signal processing applied to seismic waveforms. Examples of these applications include detection of low amplitude signals buried in ambient noise and cross-correlation of sets of waveforms to form event clusters and accurately measure delay times for event relocation and/or earth structure. These methods rely on the exploitation of the similarity of individual waveforms and have been successful… more
Date: August 30, 2006
Creator: Rodgers, A; Harris, D; Pasyanos, M; Blair, S & Matt, R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Science & Technology Review September 2006

Description: This month's article has the following articles: (1) Simulations Help Plan for Large Earthquakes--Commentary by Jane C. S. Long; (2) Re-creating the 1906 San Francisco Earthquake--Supercomputer simulations of Bay Area earthquakes are providing insight into the great 1906 quake and future temblors along several faults; (3) Decoding the Origin of a Bioagent--The microstructure of a bacterial organism can be linked to the methods used to formulate the pathogen; (4) A New Look at How Aging Bones Fr… more
Date: July 18, 2006
Creator: Radousky, H B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ground Truth, Magnitude Calibration and Regional Phase Propagation and Detection in the Middle East and Horn of Africa

Description: In this project, we are exploiting unique and open source seismic data sets to improve seismic monitoring across the Middle East (including the Iranian Plateau, Zagros Mountains, Arabian Peninsula, Turkish Plateau, Gulf of Aqaba, Dead Sea Rift) and the Horn of Africa (including the northern part of the East African Rift, Afar Depression, southern Red Sea and Gulf of Aden). The data sets are being used to perform three related tasks. (1) We are determining moment tensors, moment magnitudes and s… more
Date: July 10, 2006
Creator: Nyblade, A.; Adams, A.; Brazier, R.; Park, Y. & Rodgers, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

REGIONAL SEISMIC CHEMICAL AND NUCLEAR EXPLOSION DISCRIMINATION: WESTERN U.S. EXAMPLES

Description: We continue exploring methodologies to improve regional explosion discrimination using the western U.S. as a natural laboratory. The western U.S. has abundant natural seismicity, historic nuclear explosion data, and widespread mine blasts, making it a good testing ground to study the performance of regional explosion discrimination techniques. We have assembled and measured a large set of these events to systematically explore how to best optimize discrimination performance. Nuclear explosions … more
Date: July 7, 2006
Creator: Walter, W R; Taylor, S R; Matzel, E; Gok, R; Heller, S & Johnson, V
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Validation and Comparison of One-Dimensional Graound Motion Methodologies

Description: Both point- and finite-source stochastic one-dimensional ground motion models, coupled to vertically propagating equivalent-linear shear-wave site response models are validated using an extensive set of strong motion data as part of the Yucca Mountain Project. The validation and comparison exercises are presented entirely in terms of 5% damped pseudo absolute response spectra. The study consists of a quantitative analyses involving modeling nineteen well-recorded earthquakes, M 5.6 to 7.4 at ov… more
Date: June 28, 2006
Creator: Darragh, B.; Silva, W. & Gregor, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Finite element analyses of continuous filament ties for masonry applications:final report for the Arquin Corporation.

Description: Finite-element analyses were performed to simulate the response of a hypothetical masonry shear wall with and without continuous filament ties to various lateral loads. The loads represented three different scenarios: (1) 100 mph wind, (2) explosive attack, and (3) an earthquake. In addition, a static loading analysis and cost comparison were performed to evaluate optimal materials and designs for the spacers affixed to the filaments. Results showed that polypropylene, ABS, and polyethylene (hi… more
Date: June 1, 2006
Creator: Quinones, Armando (Arquin Corporation, La Luz, NM); Bibeau, Tiffany A. & Ho, Clifford Kuofei
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling Temporal-Spatial Earthquake and Volcano Clustering at Yucca Mountain, Nevada

Description: The proposed national high-level nuclear repository at Yucca Mountain is close to Quaternary faults and cinder cones. The frequency of these events is low, with indications of spatial and temporal clustering, making probabilistic assessments difficult. In an effort to identify the most likely intrusion sites, we based a 3D finite element model on the expectation that faulting and basalt intrusions are primarily sensitive to the magnitude and orientation of the least principal stress in extensio… more
Date: May 31, 2006
Creator: Parsons, T.; Thompson, G.A. & Cogbill, A.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Lessons Learned- The Use of Formal Expert Elicitation in Probablistic Seismic Hazard

Description: Probabilistic seismic hazard analyses provide the opportunity, indeed the requirement, to quantify the uncertainties in important inputs to the analysis. The locations of future earthquakes, their recurrence rates and maximum size, and the ground motions that will result at a site of interest are all quantities that require careful consideration because they are uncertain. The earliest PSHA models [Cornell, 1968] provided solely for the randomness or aleatory variability in these quantities. Th… more
Date: May 10, 2006
Creator: Coppersmith, K. J.; Perman, R. C. & Youngs, R. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Making and Propagating Elastic Waves: Overview of the new wave propagation code WPP

Description: We are developing a new parallel 3D wave propagation code at LLNL called WPP (Wave Propagation Program). WPP is being designed to incorporate the latest developments in embedded boundary and mesh refinement technology for finite difference methods, as well as having an efficient portable implementation to run on the latest supercomputers at LLNL. We are currently exploring seismic wave applications, including a recent effort to compute ground motions for the 1906 Great San Francisco Earthquake.… more
Date: May 9, 2006
Creator: McCandless, K P; Petersson, N A; Nilsson, S; Rodgers, A; Sjogreen, B & Blair, S C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The LLNL Heavy Element Facility -- Facility Management, Authorization Basis, and Readiness Assessment Lessons Learned in the Heavy Element Facility (B251) Transition from Category II Nuclear Facility to Radiological Facility

Description: This paper presents Facility Management, Readiness Assessment, and Authorization Basis experience gained and lessons learned during the Heavy Element Facility Risk Reduction Program (RRP). The RRP was tasked with removing contaminated glove boxes, radioactive inventory, and contaminated ventilation systems from the Heavy Element Facility (B251) at Lawrence Livermore National Laboratory (LLNL). The RRP was successful in its goal in April 2005 with the successful downgrade of B251 from a Category… more
Date: April 10, 2006
Creator: Mitchell, M.; Anderson, B.; Brown, E. & Gray, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Earthquake in South Asia: Humanitarian Assistance and Relief Operations

Description: The powerful earthquake struck northern Pakistan and India damaged the homes of as many as three million people, forcing many of them to search for alternative means of shelter. The full extent of the destruction remains unknown because government authorities and relief organizations continue to have difficulty accessing some remote locations. As of the date of this report, the United States government (USG) has pledged $410 million toward the relief effort, almost all of it to assisting Pakist… more
Date: March 24, 2006
Creator: Kronenfeld, Daniel & Margesson, Rhoda
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Seismicity Precursors of the M6.0 2004 Parkfield and M7.0 1989Loma Prieta Earthquakes

Description: The M6.0 2004 Parkfield and M7.0 1989 Loma Prietastrike-slip earthquakes on the San Andreas Fault (SAF) were preceded byseismicity peaks occurring several months prior to the main events.Earthquakes directly within the SAF zone were intentionally excluded fromthe analysis because they manifest stress-release processes rather thanstress accumulation. The observed increase in seismicity is interpretedas a signature of the increasing stress level in the surrounding crust,whereas the peaks and the … more
Date: March 9, 2006
Creator: Korneev, Valeri A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CHARACTERIZING EXTREME GROUND MOTIONS AT YUCCA MTN

Description: Characterization of the epistemic uncertainty and aleatory variability of ground motion, as part of the Yucca Mountain nuclear waste repository PSHA (Stepp et al., 2001), results in ground motion values that increase without bound as lower and lower annual probabilities of exceedance are considered. For probabilities of exceedance less than about 10{sup -6} (yr{sup -1}), use of these results as input to the site response model leads to ground motion values for the repository that most engineeri… more
Date: February 27, 2006
Creator: W. Silva, I. Wong, J. Ake, R. Quittmeyer, and C. Costantino
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Technical Report, 30 SEPTEMBER 2002 - 31 JANUARY 2006; ENERGY PARTIONING FOR SEISMIC EVENTS IN FENNOSCANDIA AND NW RUSSIA

Description: In this project we have addressed the problem of energy partitioning at distances ranging from very local to regional for various kinds of seismic sources. On the local and regional scale (20-220 km) we have targeted events from the region offshore Western Norway where we have both natural earthquake activity as well as frequent occurrence of underwater explosions carried out by the Norwegian Navy. On the small scale we have focused on analysis of observations from an in-mine network of 16-18 s… more
Date: January 31, 2006
Creator: Bungum, H.; Kvaerna, T. & Larsen, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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