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Title: Seismic monitoring: a unified system for research and verifications

Abstract

A system for characterizing either a seismic source or geologic media from observational data was developed. This resulted from an examination of the forward and inverse problems of seismology. The system integrates many seismic monitoring research efforts into a single computational capability. Its main advantage is that it unifies computational and research efforts in seismic monitoring. 173 references, 9 figures, 3 tables.

Authors:
Publication Date:
Research Org.:
California Univ., Livermore (USA). Lawrence Livermore Lab.
OSTI Identifier:
6229585
Report Number(s):
UCRL-52665
TRN: 79-012596
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; NUCLEAR EXPLOSION DETECTION; DATA PROCESSING; SEISMIC DETECTION; COMPUTER CODES; EARTHQUAKES; MATHEMATICAL MODELS; MONITORING; SEISMIC WAVES; SHOCK WAVES; UNDERGROUND EXPLOSIONS; WAVE PROPAGATION; DETECTION; EXPLOSIONS; PROCESSING; SEISMIC EVENTS; 580203* - Geophysics- Geophysical Survey Methods- (1980-1989); 450300 - Military Technology, Weaponry, & National Defense- Nuclear Explosion Detection

Citation Formats

Thigpen, L. Seismic monitoring: a unified system for research and verifications. United States: N. p., 1979. Web. doi:10.2172/6229585.
Thigpen, L. Seismic monitoring: a unified system for research and verifications. United States. doi:10.2172/6229585.
Thigpen, L. Tue . "Seismic monitoring: a unified system for research and verifications". United States. doi:10.2172/6229585. https://www.osti.gov/servlets/purl/6229585.
@article{osti_6229585,
title = {Seismic monitoring: a unified system for research and verifications},
author = {Thigpen, L.},
abstractNote = {A system for characterizing either a seismic source or geologic media from observational data was developed. This resulted from an examination of the forward and inverse problems of seismology. The system integrates many seismic monitoring research efforts into a single computational capability. Its main advantage is that it unifies computational and research efforts in seismic monitoring. 173 references, 9 figures, 3 tables.},
doi = {10.2172/6229585},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 06 00:00:00 EST 1979},
month = {Tue Feb 06 00:00:00 EST 1979}
}

Technical Report:

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  • The Configurable Seismic Monitoring System (CSMS) is a portable seismograph system that can be used for a variety of applications. In its primary format, the CSMS is the Local Seismic Network (LSN); however, the CSMS could be used for site surveys in advance of installing permanent single stations and arrays. It could also be used for special experiments requiring portable recording equipment. 4 figs.
  • The Configurable Seismic Monitoring System (CSMS), developed at the Lawrence Livermore National Laboratory (LLNL) was deployed in a 13-m deep vault on the AFTAC facility at Pinedale, Wyoming to record the Bullion nuclear test. The purpose of the exercise was to meet all provisions of the new TTBT protocol on in-country seismic recording at a Designated Seismic Station (DSS). The CSMS successfully recorded the Bullion event consistent with and meeting all requirements in the new treaty protocol. In addition, desirable seismic system features not specified in the treaty protocol were determined; treaty protocol ambiguities were identified, and useful background noisemore » recordings at the Pinedale site were obtained. 10 figs.« less
  • A high frequency capability was recently added to the Nelson, Nevada, station of Sandia's Off-Site Seismic Network. Vertical ground motions over the 1 to 100 Hz frequency band can currently be monitored at three different gain levels. A high-gain channel records ambient background motions over this frequency band, and two lower gain channels are used to record the signals from nuclear tests on NTS. We present here some of the data collected from the first NTS shot monitored by the HF system, and follow this with a detailed description of the instrumentation.
  • The beam-kicker system is briefly described. An analysis of its operation based on the sampling method is presented, together with two methods for computing the magnetic field produced by a set of endless conductors near a conducting shield where eddy currents are circulating. The first method leads to the resolution of a bidimensional Laplace equation with first kind boundary conditions (Dirichlet problem). The second method translates to electromagnetism the electrical images method currentiy used in electrostatics and yields the magnetic fleld as the sum of a triple series expansion in the general case of a set of conductors located inmore » a parallelepipedic box. The results obtained in computation of the perturbation of the particle motion due to the beam-kicker are compared with the experimental data. (auth)« less
  • The 18.14-metric-ton-capacity (20-ton) Load-Cell-Based Weighing System (LCBWS) prototype scheduled to be tested at the Oak Ridge (Tennessee) Gaseous Diffusion Plant March 20-27, 1984, is semiportable and has the potential for being highly accurate. Designed by Brookhaven National Laboratory, it can be moved to cylinders for weighing as opposed to the widely used operating philosophy of most enrichment facilities of moving cylinders to stationary accountability scales. Composed mainly of commercially available, off-the-shelf hardware, the system's principal elements are two load cells that sense the weight (i.e., force) of a uranium hexafluoride (UF/sub 6/) cylinder suspended from the LCBWS while the cylindermore » is in the process of being weighed. Portability is achieved by its attachment to a double-hook, overhead-bridge crane. The LCBWS prototype is designed to weigh 9.07- and 12.70-metric ton (10- and 14-ton) UF/sub 6/ cylinders. A detailed description of the LCBWS is given, design information and criteria are supplied, and testing procedures are outlined. A major objective of the testing is to determine the reliability and accuracy of the system. Other testing objectives include the identification of: (1) potential areas for system improvements; and (2) procedural modifications that will reflect an improved and more efficient system. Testing procedures described include, but are not limited to, methods that account for the temperature sensitivity of the instrumentation, the local variation in the acceleration due to gravity, and buoyancy effects. Operational and safety considerations are noted. 7 references, 11 figures, 8 tables.« less