Coda Spectral Peaking for Nevada Nuclear Test Site Explosions

Journal Article · Mon Sep 10 04:00:00 EDT 2007 · Bulletin of the Seismological Society of America

OSTI ID:1018838

Murphy, K R; Mayeda, K; Walter, W R

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 1018838
• Report Number(s): UCRL-JRNL-234567
• Journal Information: Bulletin of the Seismological Society of America, Journal Name: Bulletin of the Seismological Society of America Journal Issue: 1 Vol. 99; ISSN BSSAAP; ISSN 0037-1106
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
AMPLITUDES
CALIBRATION
EARTHQUAKES
EXPLOSIONS
LAWRENCE LIVERMORE NATIONAL LABORATORY
NEVADA
NEVADA TEST SITE
NUCLEAR EXPLOSIONS
NUCLEAR TEST SITES
POROSITY
POSITIONING
SPECTRA