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Wave Propagation Modeling Capabilities At Llnl Applications To Regional Discrimination
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Book Synopsis Wave Propagation Modeling Capabilities at LLNL: Applications to Regional Discrimination by : C. A. Schultz
Download or read book Wave Propagation Modeling Capabilities at LLNL: Applications to Regional Discrimination written by C. A. Schultz and published by . This book was released on 1995 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical synthesis of regional seismograms has become an integral part of Lawrence Livermore National Laboratory's (LLNL) seismic discrimination program. In this paper, we summarize our fundamental approaches to numerical modeling. Our capabilities currently include reflectivity, normal mode, boundary integral, and finite-difference modeling, along with hybrid approaches which utilize two or more of these techniques together. We apply these capabilities to the discriminant variability along three different arrays deployed during the Non- Proliferation Experiment (NPE). Phase amplitudes have been calculated for the approximately three hundred regional stations which recorded the NPE. The majority of these recordings were to the west of the NPE, along one profile of the Southern Sierra Continental Dynamics (SSCD) refraction profile. Based on the three profiles which made up the SSCD refraction experiment, traveltime tomography was utilized to develop a well constrained 3D velocity model across a profile which extends from the Basin and Range, through the southern Sierra Nevada range, the Great Valley, to the San Andreas fault zone in the coastal ranges. The western array of the NPE regional deployment consisted of 285 stations coincident with this SSCD profile. This resulted in phase and discriminant coverage along one of the most well constrained velocity profiles in the western United states. Our analysis shows that although there is amplification of Pg and Lg, Pn has some of the most dramatic variations in amplitude. In California, these amplifications coincide with the western flank of the Sierra Nevada, the eastern quarter of the Great Valley, and the coastal ranges. In Nevada, a dramatic amplification occurred in the Broken Hills volcanic region.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Regional Seismic Discrimination Research at LLNL. by :
Download or read book Regional Seismic Discrimination Research at LLNL. written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Wave Simulation and Processing with MatSeis by :
Download or read book Surface Wave Simulation and Processing with MatSeis written by and published by . This book was released on 2000 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to exploit the information on surface wave propagation that is stored in large seismic event datasets, Sandia and Lawrence Livermore National Laboratories have developed a MatSeis interface for performing phase-matched filtering of Rayleigh arrivals. MatSeis is a Matlab-based seismic processing toolkit which provides graphical tools for analyzing seismic data from a network of stations. Tools are available for spectral and polarization measurements, as well as beam forming and f-k analysis with array data, to name just a few. Additionally, one has full access to the Matlab environment and any functions available there. Previously the authors reported the development of new MatSeis tools for calculating regional discrimination measurements. The first of these performs Lg coda analysis as developed by Mayeda and coworkers at Lawrence Livermore National Laboratory. A second tool measures regional phase amplitude ratios for an event and compares the results to ratios from known earthquakes and explosions. Release 1.5 of MatSeis includes the new interface for the analysis of surface wave arrivals. This effort involves the use of regionalized dispersion models from a repository of surface wave data and the construction of phase-matched filters to improve surface wave identification, detection, and magnitude calculation. The tool works as follows. First, a ray is traced from source to receiver through a user-defined grid containing different group velocity versus period values to determine the composite group velocity curve for the path. This curve is shown along with the upper and lower group velocity bounds for reference. Next, the curve is used to create a phase-matched filter, apply the filter, and show the resultant waveform. The application of the filter allows obscured Rayleigh arrivals to be more easily identified. Finally, after screening information outside the range of the phase-matched filter, an inverse version of the filter is applied to obtain a cleaned raw waveform which can be used for amplitude measurements. Because all the MatSeis tools have been written as Matlab functions, they can be easily modified to experiment with different processing details. The performance of the propagation models can be evaluated using any event available in the repository of surface wave events.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismological Research Letters written by and published by . This book was released on 2006 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Arms Control and Disarmament Agency 1988 Annual Report by : United States. Arms Control and Disarmament Agency
Download or read book U.S. Arms Control and Disarmament Agency 1988 Annual Report written by United States. Arms Control and Disarmament Agency and published by . This book was released on 1990 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Arms Control and Disarmament Agency ... Annual Report by : United States. Arms Control and Disarmament Agency
Download or read book U.S. Arms Control and Disarmament Agency ... Annual Report written by United States. Arms Control and Disarmament Agency and published by . This book was released on 1986 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. Senate. Committee on Armed Services. Subcommittee on Arms Control Publisher : ISBN 13 : Total Pages :1238 pages Book Rating :4.:/5 (51 download)
Book Synopsis Fiscal Year 1981 Department of Energy Authorization for National Security Programs by : United States. Congress. Senate. Committee on Armed Services. Subcommittee on Arms Control
Download or read book Fiscal Year 1981 Department of Energy Authorization for National Security Programs written by United States. Congress. Senate. Committee on Armed Services. Subcommittee on Arms Control and published by . This book was released on 1980 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fiscal Year 1980 Department of Energy Authorization for Atomic Energy Defense Activities by : United States. Congress. Senate. Committee on Armed Services
Download or read book Fiscal Year 1980 Department of Energy Authorization for Atomic Energy Defense Activities written by United States. Congress. Senate. Committee on Armed Services and published by . This book was released on 1979 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Research Abstracts written by and published by . This book was released on 1975 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. National Report to International Union of Geodesy and Geophysics, 1987-1990 by :
Download or read book U.S. National Report to International Union of Geodesy and Geophysics, 1987-1990 written by and published by . This book was released on 1991 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Government Reports Annual Index written by and published by . This book was released on 1988 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geophysics & Tectonics Abstracts by :
Download or read book Geophysics & Tectonics Abstracts written by and published by . This book was released on 1987 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U.S. National Report 1987-1990 written by and published by . This book was released on 1991 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
