Abstract
The seismic source characteristics of underground nuclear explosions have now been extensively documented as a result of the testing programs which have been carried out by the various nuclear states over the past 30 years. In particular, the variations in seismic source coupling as functions of the geologic emplacement medium, yield and depth of burial of the explosion have been well-defined experimentally; and first order theoretical source models, such as the Mueller/Murphy model, have been formulated which have been shown to account reasonably well for these observed variations. The most notable feature of the nuclear source seismic coupling in the short-period band is that it is observed to be essentially the same for tamped explosions in virtually all known hardrock and water-saturated media. The only known exceptions to this uniformity are for explosions in clay and water, for which the average mb values for a given yield are higher than those in hardrock by about 0.50 ± 0.25 magnitude units, and for explosions in dry, porous media, such as dry alluvium or tuff, for which the average mb values for a given yield are lower than those in hardrock by about 0.50 ± 0.25 magnitude units. Larger changes in seismic coupling efficiency can occur if the explosion is not fully tamped, as in the cavity decoupling evasion scenario. Thus, it has been experimentally demonstrated that it is possible to reduce the mb value at a given yield by nearly two full magnitude units by detonating the explosion in a suitably large air-filled cavity. This potential variability in explosive source coupling needs to be carefully considered in the assessment of the capabilities of any proposed seismic monitoring systems.
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References
Office of Technology Assessment (1988) Seismic verification of nuclear testing treaties, OTASC-361, Government Printing Office, Washington, DC.
Springer, D., M. Denny, J. Healy and W. Mickey (1968) The Sterling experiment: decoupling of seismic waves by a shot-generated cavity, J. Geophys. Res., 73, pp. 5995–6011.
Mueller, R. A. and J. R. Murphy (1971) Seismic characteristics of underground nuclear detonations. Part I. Seismic spectrum scaling, Bull. Seism. Sac. Am., 61, 1975.
Murphy, J. R. (1977) Seismic source functions and magnitude determinations for underground nuclear detonations, Bull. Seism. Soc. Am., 67, 135–158.
Sultanov, D. D., Kh. D. Rubinshtein, E. N. Ferapontova, P. B. Kaazik, O. P. Kuznetsov, I. O. Kitov, N. I. Nedoshivin, V. M. Ovtchinnikov, Yu., K. Malyshev and O. P. Willemson (1993) Investigation of seismic efficiency of Soviet peaceful nuclear explosions conducted in various geological conditions, Institute for Dynamics of the Geospheres, Russian Academy of Sciences Report dated July 29, 1993.
Murphy, J. R. and B. W. Barker (1994) Application of network-averaged teleseismic P wave spectra to an analysis of the seismic source characteristics of Soviet PNE explosions, S-CUBED, SSS-FR-94-14528.
Murphy, J. R. (1993) Comment on –Q for short-period P waves: is it frequency dependent? by A. Douglas, Geophys. J. Int. 113, 535–540.
Murphy, J. R. (1981) P wave coupling of underground explosions in various geologic media, in E. S. Husebye and S. Mykkeltveit (eds.), Identification of Seismic Sources -Earthquake or Underground Explosion, D. Reidel Publishing Company, Dordrecht, pp. 201–205.
Murphy, J. R., B. W. Barker and A. O–Donnell (1989) Network-averaged teleseismic P-wave spectra for underground explosions. Part I. Definitions and examples, Bull. Seism. Soc. Am., 79, pp. 141–155.
Murphy, J. R. (1989) Network-averaged teleseismic P wave spectra for underground explosions. Part II. Source characteristics of Pahute Mesa Explosions, Bull. Seism. Soc. Am., 79, pp. 156–171.
Sykes, L. L. and Ekstrom, G. (1989) Comparison of seismic and hydrodynamic yield determinations for the Soviet Joint Verification Experiment of 1988, Proc. Nat. Acad. Sci. USA, 86, 3456–3460.
Bocharov, V. S., S. A. Zelentsov and V. N. Mikhailov (1989) Characteristics of 96 underground nuclear explosions at the Semipalatinsk test site, Atomic Energy (Atomnaya Energiya), 67, 3.
Murphy, J. R. (1991) Free-field seismic observations from underground nuclear explosions, in H. J. Patton and S. R. Taylor (eds.), Explosion Source Phenomenology, American Geophysical Union, Geophysical Monograph 65, pp. 25–33.
Rygg, E. (1979) Anomalous surface waves from underground explosions, Bull. Seism. Soc. Am., 69, pp. 1995–2000.
Stevens, J. L. (1986) Estimation of scalar moments from explosion-generated surface waves, Bull. Seism. Soc. Am., 76, pp. 123–151.
Given, J. W. and G. R. Mellman (1986) Estimating explosion and tectonic release source parameters of underground nuclear explosions from Rayleigh and Love wave observations, Sierra Geophysics Report, SGI-R-86-126, 70 pp. 1986.
Patton, H. J. (1991) Seismic moment estimation of underground nuclear explosions: A review of surface wave results and implications for the source, in H. J. Patton and S. R. Taylor (eds.), Explosion Source Phenomenology, American Geophysical Union, Geophysical Monograph 65, pp. 128–134.
Ekstrom, G. and P. G. Richards (1993) Empirical measurements of tectonic moment release in nuclear explosions from teleseismic surface waves and body waves, PL-TR-93-2227.
Rodean, H. C. (1971) Cavity decoupling of nuclear explosions, UCRL-51097.
Stevens, J. L., J. R. Murphy and N. Rimer (1991), Seismic source characteristics of cavity decoupled explosions in salt and tuff, Bull. Seism. Soc. Am., 81, 4 pp. 1272–1291.
Murphy, J. R. and B. W. Barker (1994) Seismic identification analyses of cavity decoupled nuclear and chemical explosions, S-CUBED, PL-TR-94-2036.
Walter, W. R., H. J. Patton and K. M. Maid (1994) Regional seismic observations of the NPE at the Livermore NTS network, U.S. Department of Energy, Non-Proliferation Experiment Symposium, Rockville, Maryland, April.
Stump, B. W., D. C. Pearson and R. E. Reinke (1994) Source comparisons between nuclear and chemical explosions detonated at Rainier Mesa Nevada test site, Los Alamos CTBT R&D Program, LAUR-94-4073.
Richards, P. G., D. A. Anderson and D. W. Simpson (1992) A survey of blasting activity in the United States, Bull. Seism. Soc. Am., 82, 1416–1433.
Rivière-Barbier, F. (1993) Status report on the cooperative research program between the EME and the CSS for exchange and analysis of seismic data from quarry blasts in Russia and in the U.S., DARPA Center for Seismic Studies Report C93-01.
Barker, T. G., K. L. McLaughlin and J. L. Stevens (1992) Numerical simulation of quarry blast sources, S-CUBED Technical Report to DARPA, SSS-TR-93-13859.
Hedlin, M. A., J. B. Minster and J. A. Orcutt (1990) An automatic means to discriminate between earthquakes and quarry blasts, Bull. Seism. Soc. Am., 80, 2143–2160.
Kim, W. Y., D. W. Simpson and P. G. Richards (1994) High-frequency spectra of regional phases from earthquakes and chemical explosions, Bull. Seism. Soc. Am., 84, 1365–1386.
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© 1996 Springer Science+Business Media Dordrecht
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Murphy, J.R. (1996). Types of Seismic Events and Their Source Descriptions. In: Husebye, E.S., Dainty, A.M. (eds) Monitoring a Comprehensive Test Ban Treaty. NATO ASI Series, vol 303. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0419-7_16
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DOI: https://doi.org/10.1007/978-94-011-0419-7_16
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