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Title: Modelling infrasound signal generation from two underground explosions at the Source Physics Experiment using the Rayleigh integral

Abstract

For this study, we use the Rayleigh integral (RI) as an approximation to the Helmholtz–Kirchoff integral to model infrasound generation and propagation from underground chemical explosions at distances of 250 m out to 5 km as part of the Source Physics Experiment (SPE). Using a sparse network of surface accelerometers installed above ground zero, we are able to accurately create synthetic acoustic waveforms and compare them to the observed data. Although the underground explosive sources were designed to be symmetric, the resulting seismic wave at the surface shows an asymmetric propagation pattern that is stronger to the northeast of the borehole. This asymmetric bias may be attributed to the subsurface geology and faulting of the area and is observed in the acoustic waveforms. We compare observed and modelled results from two of the underground SPE tests with a sensitivity study to evaluate the asymmetry observed in the data. This work shows that it is possible to model infrasound signals from underground explosive sources using the RI and that asymmetries observed in the data can be modelled with this technique.

Authors:
 [1];  [2];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1426909
Report Number(s):
SAND2013-9173J
Journal ID: ISSN 0956-540X; 534069
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Geophysical Journal International
Additional Journal Information:
Journal Volume: 200; Journal Issue: 2; Journal ID: ISSN 0956-540X
Publisher:
Oxford University Press
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Time-series analysis; Controlled source seismology; Seismic monitoring and test-ban treaty verification; Wave propagation; Acoustic properties

Citation Formats

Jones, Kyle R., Whitaker, Rodney W., and Arrowsmith, Stephen J. Modelling infrasound signal generation from two underground explosions at the Source Physics Experiment using the Rayleigh integral. United States: N. p., 2014. Web. doi:10.1093/gji/ggu433.
Jones, Kyle R., Whitaker, Rodney W., & Arrowsmith, Stephen J. Modelling infrasound signal generation from two underground explosions at the Source Physics Experiment using the Rayleigh integral. United States. doi:10.1093/gji/ggu433.
Jones, Kyle R., Whitaker, Rodney W., and Arrowsmith, Stephen J. Thu . "Modelling infrasound signal generation from two underground explosions at the Source Physics Experiment using the Rayleigh integral". United States. doi:10.1093/gji/ggu433. https://www.osti.gov/servlets/purl/1426909.
@article{osti_1426909,
title = {Modelling infrasound signal generation from two underground explosions at the Source Physics Experiment using the Rayleigh integral},
author = {Jones, Kyle R. and Whitaker, Rodney W. and Arrowsmith, Stephen J.},
abstractNote = {For this study, we use the Rayleigh integral (RI) as an approximation to the Helmholtz–Kirchoff integral to model infrasound generation and propagation from underground chemical explosions at distances of 250 m out to 5 km as part of the Source Physics Experiment (SPE). Using a sparse network of surface accelerometers installed above ground zero, we are able to accurately create synthetic acoustic waveforms and compare them to the observed data. Although the underground explosive sources were designed to be symmetric, the resulting seismic wave at the surface shows an asymmetric propagation pattern that is stronger to the northeast of the borehole. This asymmetric bias may be attributed to the subsurface geology and faulting of the area and is observed in the acoustic waveforms. We compare observed and modelled results from two of the underground SPE tests with a sensitivity study to evaluate the asymmetry observed in the data. This work shows that it is possible to model infrasound signals from underground explosive sources using the RI and that asymmetries observed in the data can be modelled with this technique.},
doi = {10.1093/gji/ggu433},
journal = {Geophysical Journal International},
issn = {0956-540X},
number = 2,
volume = 200,
place = {United States},
year = {2014},
month = {12}
}

Works referenced in this record:

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