Discussion of “Seismic source function for an underground nuclear explosion” by Keiiti Aki, Michel Bouchon, and Paul Reasenberg

1974 ◽  
Vol 64 (5) ◽  
pp. 1595-1597 ◽  
Author(s):  
J. R. Murphy
Keyword(s):  
Source Function ◽  
Nuclear Explosion ◽  
Seismic Source ◽  
Underground Nuclear Explosion

Geologic effects of the Rainier underground nuclear explosion : a summary progress report of U.S. Geological Survey investigations

1959 ◽  
Author(s):  
William H. Diment ◽  
V.R. Wilmarth ◽  
R.E. Wilcox ◽  
Alfred Clebsch ◽  
G.E. Manger ◽  
...  
Keyword(s):  
Nuclear Explosion ◽  
Progress Report ◽  
Geological Survey ◽  
Underground Nuclear Explosion

An experimental study of source motion synthesis from first arrivals

1963 ◽  
Vol 53 (5) ◽  
pp. 955-963
Author(s):  
Henry N. Pollack
Keyword(s):  
Experimental Study ◽  
Source Function ◽  
Seismic Source ◽  
The Body ◽  
Body Waves ◽  
Fixed Position ◽  
Explosive Source ◽  
Simple Medium ◽  
Surface Ice ◽  
Source Motion

Abstract The motion near a seismic source is synthesized from experimentally obtained seismograms of non-dispersed body waves. The body waves were emitted from an explosive source submerged in a lake with a frozen surface. The seismograms were recorded at several distances by moving the source to a greater depth for each record, while the seismometer remained in a fixed position on the surface ice sheet. All syntheses of the waveform one meter from the source yield the impulsive nature of the source. Deviations between the synthesized one-meter record and the observed one-meter motion are thought to reflect primarily the changing character of the shot medium with depth from the ice. These results indicate that over the short propagation distances (about three wavelengths for the higher frequencies recorded) through the simple medium of this experiment, the observed waveforms and their associated spectra retain characteristics of the source function. The records also yield some information regarding the nature and structure of the elastic medium about the source.

Radioecological studies at the Kraton-3 underground nuclear explosion site in 1978–2007: a review

2009 ◽  
Vol 100 (12) ◽  
pp. 1092-1099 ◽  
Author(s):  
V. Ramzaev ◽  
A. Mishin ◽  
V. Golikov ◽  
T. Argunova ◽  
V. Ushnitski ◽  
...  
Keyword(s):  
Nuclear Explosion ◽  
Underground Nuclear Explosion

Seismic source function for an underground nuclear explosion

1974 ◽  
Vol 64 (1) ◽  
pp. 131-148 ◽  
Author(s):  
Keiiti Aki ◽  
Michel Bouchon ◽  
Paul Reasenberg
Keyword(s):  
Rayleigh Waves ◽  
Dynamic Range ◽  
Seismic Source ◽  
Wide Band ◽  
Step Function ◽  
Underground Explosion ◽  
Published Data ◽  
Underground Nuclear Explosion ◽  
Far Field ◽  
Displacement Potential

abstract The reduced displacement potential obtained from close-in observation of seismic displacement during an underground explosion usually takes the form of a step function with or without a small overshoot. Theoretical prediction by shock-wave calculation appears to agree with the close-in data. The step-function source has also been supported by the observations on Rayleigh waves at periods longer than 10 sec. We found, however, some inconsistency between the published data on residual potentials obtained from close-in data and those on seismic moments obtained from long-period Rayleigh waves. It appears that only about 13 of the residual potential is transmitted to the far-field at long periods. This discrepancy is, however, consistent with several observations made on teleseismic signals suggesting an impulse rather than a step as the primary form of the potential function. New observations of the two NTS events at distances 2.6 to 7.8 km using wide dynamic range, wide-band accelerometers, combined with data from the far-field, support a large overshoot 4 to 5 times the residual value. This result accounts for the efficiency of the Ms - mb discriminant between earthquakes and explosions with mb around 4 and greater. The compaction of the source volume by spalling was suggested as a possible mechanism for the large overshoot.

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