Seismic Source Characteristics of Nuclear Explosions in Water-filled Cavities

2001 ◽  
Vol 158 (11) ◽  
pp. 2105-2121 ◽  
Author(s):  
J. R. Murphy ◽  
D. D. Sultanov ◽  
N. Rimer ◽  
B. W. Barker
Keyword(s):  
Seismic Source ◽  
Nuclear Explosions ◽  
Source Characteristics

Seismic Source Characteristics of Soviet Peaceful Nuclear Explosions

2001 ◽  
Vol 158 (11) ◽  
pp. 2077-2101 ◽  
Author(s):  
J. R. Murphy ◽  
I. O. Kitov ◽  
B. W. Barker ◽  
D. D. Sultanov
Keyword(s):  
Seismic Source ◽  
Nuclear Explosions ◽  
Source Characteristics

Seismic source characteristics from explosion-generated P waves

1968 ◽  
Vol 58 (6) ◽  
pp. 1833-1848 ◽  
Author(s):  
Lynn D. Trembly ◽  
Joseph W. Berg
Keyword(s):  
High Frequency ◽  
Transfer Functions ◽  
Low Frequency ◽  
Seismic Energy ◽  
Seismic Source ◽  
Propagation Path ◽  
P Waves ◽  
Nuclear Explosions ◽  
Source Characteristics ◽  
The Earth

ABSTRACT Signals from nuclear explosions were used to calibrate seismograph stations (near-regional, regional, and teleseismic ranges) by determining the transfer functions of the lumped source-propagation path-receiver systems. Recorded signals other than those used for calibration purposes were used to derive the characteristics of the sources. It was found that source functions could be derived from distant signals when the frequencies of the output signals were reliably related to the source. For the output data used in this research, the low-frequency cutoff was 0.2 cps at all stations and the high-frequency cutoffs were 4.0, 3.0, and 2.0 cps at the near-regional, regional, and teleseismic distances, respectively. The low-frequency cutoff was due mainly to the recording instruments, and the high-frequency cutoffs were due to the attentuation of the seismic energy by the Earth. The most reliable results were obtained when three half-cycles of the observed output signals (first arrivals) were used. When explosions in granite were used as calibration sources, the energies derived for explosions in tuff, alluvium, and dolomite media were 88, 65, and 12 per cent of the respective “observed” source energies.

GASBUGGY SEISMIC SOURCE MEASUREMENTS

Geophysics ◽  
1972 ◽  
Vol 37 (2) ◽  
pp. 301-312 ◽  
Author(s):  
William R. Perret
Keyword(s):  
Seismic Source ◽  
Gas Production ◽  
Tight Gas ◽  
Near Surface ◽  
Nuclear Explosions ◽  
Vertical Displacements ◽  
Remote Station ◽  
Displacement Potentials ◽  
Gas Bearing ◽  
Peak Value

Gasbuggy, a 29‐kt nuclear experiment, was detonated December 10, 1967, at a depth of 4240 ft in the San Juan Basin in New Mexico. Its purpose was to develop techniques for stimulation of natural gas production from tight gas‐bearing formations. Data from four subsurface instrument stations in a boring 1500 ft from Gasbuggy indicated formation of a spherical cavity of 88 ft radius and a microfracture radius of about 480 ft. The mean peak value of reduced displacement potentials which defined the seismic source was [Formula: see text]. Calculations indicate that about 2 percent of the energy released remained in the seismic source at 1500 ft. Data from surface motion instruments distributed between surface zero and 8400 ft were similar to those observed above any other contained nuclear explosions. Spalling was indicated at all surface stations. Transient vertical displacements indicate a mound about 6.7 inches high near surface zero and extending through the most remote station where uplift was 0.3 inch.

Seismic source and transmission functions from underground nuclear explosions

1974 ◽  
Vol 64 (4) ◽  
pp. 1275-1293
Author(s):  
Ola Dahlman
Keyword(s):  
Seismic Source ◽  
Theoretical Models ◽  
Test Site ◽  
Distance Curve ◽  
Underground Nuclear Explosions ◽  
Nuclear Explosions ◽  
Short Period ◽  
Source Models ◽  
Function Models ◽  
Relative Differences

abstract A model is presented for the simultaneous detemination of the relative variation in transmission properties to different stations and of the relative differences between the seismic sources for closely spaced underground nuclear explosions recorded by a fixed seismological station network. The model is applied to short-period data reported from 24 globally distributed stations from 12 underground nuclear explosions with known yields at Nevada Test Site. The obtained transmission functions vary within a factor of 10 between the different stations and show a weak decrease with epicenter distance and little correlation with the Gutenberg amplitude-distance curve. The relative source functions for 10 explosions in tuff and rhyolite, with yields in the range 16 to 1,200 kt, are with good correlation proportional to explosion yield to 0.9. Two theoretical source-function models, one by Haskell (1967) and one by Mueller and Murphy (1971a), are compared with each other and they agree well for frequencies around 1 Hz and for yields in the range 3 to 300 kt. The Haskell model for tuff is modified to be more compatible with the models for salt, granite and alluvium. The Haskell model predicts stronger variation of the source functions with frequency and yield than the Mueller-Murphy model. The observed relative source functions are compared with the theoretical source functions obtained from the two source models. The agreement is fairly good but the relative decrease of the source functions at yields above 300 kt predicted by the theoretical models is not observed.

Seismic source summary for U.S. underground nuclear explosions, 1971-1973

1975 ◽  
Vol 65 (2) ◽  
pp. 343-349 ◽  
Author(s):  
Donald L. Springer ◽  
Ross L. Kinnaman
Keyword(s):  
Seismic Source ◽  
Underground Nuclear Explosions ◽  
Nuclear Explosions ◽  
Time Period ◽  
Surface Collapse

abstract A summary of information is presented for all announced U.S. underground nuclear explosions detonated during the 1971-1973 time period. The data include detonation times, locations, and depths of burial, as well as information about shot media and surface collapse (subsidence) phenomena. This summary is an addendum to a previous publication which covered the period 1961-1970, and includes some additions and corrections to that work.

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