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Further Studies Of The Seismic Characteristics Of Russian Explosions In Cavities Implications For Cavity Decoupling Of Underground Nuclear Explosions
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Book Synopsis Further Studies of the Seismic Characteristics of Russian Explosions in Cavities: Implications for Cavity Decoupling of Underground Nuclear Explosions by :
Download or read book Further Studies of the Seismic Characteristics of Russian Explosions in Cavities: Implications for Cavity Decoupling of Underground Nuclear Explosions written by and published by . This book was released on 1996 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides a summary of the results of a joint research program under which scientists from S-CUBED have been working with scientists from the Russian Institute for Dynamics of the Geospheres in an attempt to develop a better understanding of the effects of cavity decoupling on the seismic signals produced by underground nuclear explosions. Investigations conducted under this program have focused on analyses of seismic data recorded from a series of HE cavity decoupling experiments conducted by the Russians in Kirghizia in 1960, and from a sequence of nuclear tests conducted in a water-filled cavity at the Soviet Azgir test site during the period 1975-1979. The Kirghizia series included tests designed to assess the influence of cavity geometry on decoupling effectiveness, and comparisons of near-field seismic data recorded from these tests indicate that the low frequency decoupling factor is independent of cavity shape for elongated cavities with length to width ratios of 6 or more, in agreement with previous theoretical simulation results. Broadband seismic data recorded from the Azgir water-filled cavity tests are analyzed to estimate cavity/tamped source spectral ratios, and the results are compared with theoretical finite difference simulations of these tests.
Book Synopsis Analyses of the Seismic Characteristics of U.S. and Russian Cavity Decoupled Explosions by :
Download or read book Analyses of the Seismic Characteristics of U.S. and Russian Cavity Decoupled Explosions written by and published by . This book was released on 1994 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a summary of the initial results of an on-going joint research program in which S-CUBED scientists are working with Russian scientists from the Institute for Dynamics of the Geospheres in an attempt to develop a better understanding of the effects of cavity decoupling on the seismic signals produced by underground nuclear explosions. This program includes analyses of seismic data recorded from a series of 10 tamped and 12 decoupled HE tests which were conducted in cavities of different sizes and shapes in Kirghizia in 1960, a theoretical evaluation of the influence of radiation diffusion effects on nuclear cavity decoupling efficiency and an analysis of data recorded from six small (0.01 to 0.50 kt) Russian nuclear tests conducted in a 32 m radius, water-filled cavity in salt at the Azgir test site. (MM).
Book Synopsis Forensic Explosion Seismology by : So Gu Kim
Download or read book Forensic Explosion Seismology written by So Gu Kim and published by Cambridge Scholars Publishing. This book was released on 2020-03-02 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses three major physical phenomena for active source seismology, namely underwater explosions, underground nuclear explosions, and large-scale on-surface chemical explosions. In particular, contributors consider how to use the technologies and applications in active source seismology and seismo-acoustics, rather than the theoretical approach for the resolution of the forensic explosion seismology in the light of an application for defense sciences. The volume also presents seismological investigations of discrimination between earthquakes and man-made explosions.
Book Synopsis Seismic Identification Analyses of Cavity Decoupled Nuclear and Chemical Explosions by : John R. Murphy
Download or read book Seismic Identification Analyses of Cavity Decoupled Nuclear and Chemical Explosions written by John R. Murphy and published by . This book was released on 1994 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of the Seismic Characteristics of U.S. and Russian Cavity Decoupled Explosions by : J. R. Murphy
Download or read book Analysis of the Seismic Characteristics of U.S. and Russian Cavity Decoupled Explosions written by J. R. Murphy and published by . This book was released on 1995 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cavity decoupling evasion scenario remains as the greatest challenge to effective seismic monitoring of any eventual CTBT. However, despite the fact that the feasibility of this evasion concept was experimentally established nearly 30 years ago by the U.S. STERLING test, a number of issues of importance with respect to seismic monitoring still remain unresolved. In an attempt to address some of these issues, we have been working with scientists from the Russian Institute For Dynamics of the Geospheres to integrate the limited U.S. and Russian data and modeling experience into a uniform database on cavity decoupling. During the past year, our research has centered on analyses of data recorded from an extensive series of Russian HE cavity decoupling tests conducted in Kirghizia in 1960 and on analyses of seismic data recorded from six Russian nuclear tests conducted in a water-filled cavity at Azgir. The Kirghizia HE cavity decoupling series consisted of 10 tamped and 12 cavity tests in limestone, and included tests of the same yield in both spherical and nonspherical cavities of equal volume. Comparisons of near-field seismic data recorded from these tests indicate that the low frequency decoupling effectiveness is approximately independent of cavity shape for roughly cylindrical cavities with length to width ratios of 6 or more, in agreement with previous theoretical simulation results. Spectral analyses of waveform data recorded at the same distances from 1.0 ton tamped explosions and from a 1.0 ton decoupled test in a spherical cavity with a radius of 2.88 m indicate a maximum low frequency decoupling factor of about 25 for this test.
Book Synopsis High Frequency Seismic Source Characteristics of Cavity Decoupled Underground Nuclear Explosions by : J. R. Murphy
Download or read book High Frequency Seismic Source Characteristics of Cavity Decoupled Underground Nuclear Explosions written by J. R. Murphy and published by . This book was released on 1988 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research investigated the high frequency characteristics of the seismic sources corresponding to cavity decoupled nuclear explosions and to assess the implications of these investigations with regard to the detection and discrimination of small decoupled explosions. This study has been carried out using a combination of deterministic simulations and analyses of empirical data recorded from selected cavity decoupled explosions. With regard to the deterministic simulations, a series of nonlinear finite difference calculations have been performed to simulate cavity decoupled explosions in unsaturated tuff and salt emplacement media. These simulations have confirmed the fact that the simple step pressure approximation is not valid at high frequencies and that the initial pressure spike on the cavity wall can induce significant nonlinear response. Preliminary analyses of high frequency seismic data recorded from the STERLING decoupled explosion in salt and the MILL YARD decoupled explosion in unsaturated tuff have provided evidence that the high frequency source components associated with the complex cavity pressure loadings do effectively couple into the seismic regime, in agreement with the predictions of the nonlinear finite difference simulations.
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 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Comparative Analysis of the Seismic Characteristics of Cavity Decoupled Nuclear and Chemical Explosions by :
Download or read book A Comparative Analysis of the Seismic Characteristics of Cavity Decoupled Nuclear and Chemical Explosions written by and published by . This book was released on 1995 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Successful seismic monitoring of any eventual Comprehensive Test Ban Treaty will require the development of a capability to identify signals from small cavity decoupled nuclear explosions from among the numerous signals to be expected from earthquakes, rockbursts and chemical explosion (CE) events of comparable magnitude. The investigations summarized in this report center on a variety of comparative analyses of observed and simulated seismic data corresponding to decoupled nuclear explosions with data recorded from both tamped and near-surface, ripple-fired CE events. More specifically, seismic data recorded from cavity decoupled nuclear tests in both the U.S. and former Soviet Union are used to assess the relative seismic coupling efficiencies of the different types of CE events and to evaluate potential seismic discriminants which might be used to identify the various source types. The results of these comparison studies indicate that tamped CE events with yields on the order of 7 tons and ripple fired CE events with yields in the 70-100 ton range can be expected to produce near-regional ground motion levels comparable to those expected from fully decoupled 1 kt nuclear explosions at Azgir.
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1960-05 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1962 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Re-Evaluation of Evasion Possibilities for Conducting Nuclear Explosions in Underground Cavities in Former USSR. by :
Download or read book Re-Evaluation of Evasion Possibilities for Conducting Nuclear Explosions in Underground Cavities in Former USSR. written by and published by . This book was released on 1996 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The detonation of nuclear explosions in large underground cavities so as to muffle or decouple the seismic waves they generated has been debated for more than 35 years. The research completed under this contract is concerned with various aspects of verifying a Comprehensive Test Ban Treaty in an evasive environment wherein decoupled nuclear testing might be attempted. Chapter 1 reviews the history of the decoupling concept, assesses what countries have the technological capabilities to carry out such a test of a given yield, and evaluates a number of decoupling scenarios. I conclude that testing with large decoupling factors, DF, is feasible for yields of a few kilotons (kt) or larger only in cavities in salt domes. Past nuclear explosions conducted in salt for which cavities may remain standing that are large enough for the full decoupling of explosions with yields> 0.5 kt are concentrated in only a few areas of Kazaldistan and Russia. The existence of all cavities of that size that were created by past nuclear explosions is known since the explosions that created those cavities must be at least 20 times larger in yield than the size of a fully decoupled event that can be detonated in them. Hence, the monitoring of cavities created in that way that may remain standing should be relatively easy at the 1 kt level if appropriate verification measures are put in place. While large cavities can be created in salt by solution.
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1960-05 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Book Synopsis Some Seismic Effects of Underground Explosions in Cavities by : George L. Lamb
Download or read book Some Seismic Effects of Underground Explosions in Cavities written by George L. Lamb and published by . This book was released on 1960 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Buried Pressurized Cavity Model of Venting from Nuclear Explosion Cavities by : Francis Alexander McKeown
Download or read book Buried Pressurized Cavity Model of Venting from Nuclear Explosion Cavities written by Francis Alexander McKeown and published by . This book was released on 1972 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Regional Seismic Detection Analyses of Selected Soviet Peaceful Nuclear Explosions by :
Download or read book Regional Seismic Detection Analyses of Selected Soviet Peaceful Nuclear Explosions written by and published by . This book was released on 1996 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seismic detection of small, evasively tested underground nuclear explosions remain as a major challenge to effective verification of any eventual CTBT. Most seismic detection research reported to date has focused on analyses of regional seismic signals recorded from explosions at the few known nuclear weapons test sites and, consequently, represent only limited ranges of the source and propagation path conditions of potential monitoring interest. In this study, we analyze regional seismic data recorded at the Borovoye station in Central Asia from a selected group of Soviet PNE tests which sample wider ranges of the source and propagation path variables of interest. The results of these analyses have indicated that it will in general be difficult to seismically detect low-yield, cavity decoupled nuclear explosions, even with high quality stations at regional distance of 100 or less, and that additional research will be required to optimize the seismic networks and signal processing systems needed to monitor such clandestine tests.
Book Synopsis Cavities Produced by Underground Nuclear Explosions by : T. R. Butkovich
Download or read book Cavities Produced by Underground Nuclear Explosions written by T. R. Butkovich and published by . This book was released on 1976 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Congressional Record by : United States. Congress
Download or read book Congressional Record written by United States. Congress and published by . This book was released on 1960 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
