HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by TAYLOR, S. R. Articles by DOWLA, F. U. Search for Related Content GeoRef GeoRef Citation

Spectral yield estimation of NTS explosions

EARTH SCIENCES DEPARTMENT LAWRENCE LIVERMORE NATIONAL LABORATORY UNIVERSITY OF CALIFORNIA, LIVERMORE, CALIFORNIA 94550

Abstract

The yields of 299 NTS explosions have been estimated from Pn, Pg and Lg spectra (between 0.1 and 10 Hz) at four regional seismic stations. A spectral template matching technique is used where the spectra from an explosion of unknown yield are compared with the spectra of explosions of known yield. A matching function is defined that is a scaled inverse of the difference between the spectra from the known and unknown explosions. The yields from the seven closest matching explosions are then averaged to estimate the yield of the unknown event. The spectral matching technique appears to perform as well as standard regression techniques utilizing m_b(Pn) and m_b(Lg) measurements except that no geologic information (such as gas-filled porosity) is required. However, the spectral matching technique is only applicable to very well-calibrated test sites. The key to spectral matching is that the spectral shape is sensitive to the near-source geology. In addition to affecting the absolute spectral levels (i.e., coupling), the dynamic response of the near source material to the radiated shock wave is a major factor controlling the shape of the radiated spectra. The spectral shape can therefore be used as an indicator for predicting the coupling of an explosion, which can be subsequently used to predict its yield.

Footnotes

^* Present address: MSC335, Los Alamos National Laboratory, Los Alamos, New Mexico 87545.

This article has been cited by other articles:

				S. R. TAYLOR Analysis of high-frequency Pg/Lg ratios from NTS explosions and western U.S. earthquakes Bulletin of the Seismological Society of America, August 1, 1996; 86(4): 1042 - 1053. [Abstract] [PDF]

				E. M. Jones and S. R. Taylor Are Lg spectra from NTS explosions self-similar? Bulletin of the Seismological Society of America, April 1, 1996; 86(2): 445 - 456. [Abstract] [PDF]

				R. R. LEACH Jr., F. U. DOWLA, and E. S. VERGINO Yield estimation using bandpass-filtered seismograms: Preliminary results using neural networks with mb(Pn), short-time, long-time, and coda energy measurements Bulletin of the Seismological Society of America, April 1, 1993; 83(2): 488 - 508. [Abstract] [PDF]