Chemical explosions and the discrimination problem. Final report, 1 Apr 90-30 Apr 91
This report is in three sections: Section one describes empirical estimates of yield and tectonic release for 71 underground nuclear explosions conducted at the Shagan River Test Site, Kazakhstan, from 1977 to 1989. The method is based upon teleseismic observations of fundamental mode Love and Rayleigh waves at stations of the GDSN, CDSN, RSTN, and IRIS/USGS GSN. In 1977 as few as five stations were providing data, while in the late 1980's more than 25 stations were operational. Section two makes a case for generating lists of problems events - seismic sources whose signals cannot easily be discriminated - as a mechanism for achieving three goals: (1) encouraging seismologists to contribute data that may help to discriminate events listed; (2) training; and (3) helping to build consensus in the technical community, on what types of problem events are truly intractable with current data Section three describes spectral-temporal characteristics of regional seismograms and shows how they can be used to discriminate between different types of seismic sources. We analyze the high-frequency (1-40 hz) spectral of chemical explosions and earthquakes at local and regional distances to understand the seismic signal characteristics of different types of sources and to find stable discriminators. We evaluate the application of the spectrogram technique to regional seismograms in different geologic settings using data from single explosions, multiple-hole instantaneous explosions, ripple-fired quarry blasts, and earthquakes. The effects on high frequency spectra of local source and recorder site conditions and source to receiver path are also analyzed.
- Research Organization:
- Columbia Univ., Palisades, NY (United States). Lamont-Doherty Geological Observatory
- OSTI ID:
- 7175440
- Report Number(s):
- AD-A-251594/8/XAB; CNN: F19628-88-K-0041
- Country of Publication:
- United States
- Language:
- English
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98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
ASIA
CHEMICAL EXPLOSIONS
DETECTION
DEVELOPED COUNTRIES
EARTHQUAKES
EUROPE
EXPLOSIONS
LOVE WAVES
MEASURING INSTRUMENTS
NUCLEAR EXPLOSION DETECTION
NUCLEAR EXPLOSIONS
RAYLEIGH WAVES
SEISMIC ARRAYS
SEISMIC DETECTION
SEISMIC DETECTORS
SEISMIC EVENTS
SEISMIC SURFACE WAVES
SEISMIC WAVES
SEISMOGRAPHS
SEISMOLOGY
SPECTRA
TEST FACILITIES
UNDERGROUND EXPLOSIONS
USSR
YIELDS