Coda Spectral Peaking for Nevada Nuclear Test Site Explosions

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We have applied the regional S-wave coda calibration technique of Mayeda et al. (2003) to earthquake data in and around the Nevada Test Site (NTS) using 4 regional broadband stations from the LLNL seismic network. We applied the same path and site corrections to tamped nuclear explosion data and averaged the source spectra over the four stations. Narrowband coda amplitudes from the spectra were then regressed against inferred yield based on the regional m{sub b}(Pn) magnitude of Denny et al. (1987), along with the yield formulation of Vergino and Mensing (1990). We find the following: (1) The coda-derived spectra show ... continued below

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Murphy, K R; Mayeda, K & Walter, W R September 10, 2007.

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We have applied the regional S-wave coda calibration technique of Mayeda et al. (2003) to earthquake data in and around the Nevada Test Site (NTS) using 4 regional broadband stations from the LLNL seismic network. We applied the same path and site corrections to tamped nuclear explosion data and averaged the source spectra over the four stations. Narrowband coda amplitudes from the spectra were then regressed against inferred yield based on the regional m{sub b}(Pn) magnitude of Denny et al. (1987), along with the yield formulation of Vergino and Mensing (1990). We find the following: (1) The coda-derived spectra show a peak which is dependent upon emplacement depth, not event size; (2) Source size estimates are stable for the coda and show a dependence upon the near-source strength and gas porosity; (3) For explosions with the same m{sub b}(Pn) or inferred yield, those in weaker material have lower coda amplitudes at 1-3 Hz.

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PDF-file: 18 pages; size: 0.5 Mbytes

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  • Journal Name: Bulletin of the Seismological Society of America, vol. 99, no. 1, February 1, 2009, pp. 441-448; Journal Volume: 99; Journal Issue: 1

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  • Report No.: UCRL-JRNL-234567
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1018838
  • Archival Resource Key: ark:/67531/metadc841854

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  • September 10, 2007

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 2, 2016, 10:15 p.m.

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Murphy, K R; Mayeda, K & Walter, W R. Coda Spectral Peaking for Nevada Nuclear Test Site Explosions, article, September 10, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc841854/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.