The Dependence of Body Wave Magnitude on Yield for Underground Explosions in Salt
SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
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The dependence of body wave magnitude m sub b on yield for explosions in salt is addressed. The objective is to compare Eurasian explosions in salt to hypothetical explosions in salt at Nevada Test Site NTS and to actual NTS explosions in granite. The coupling of the explosion energy into elastic waves is computed with a finite difference program. Four calculations were done in which all material properties were fixed except the overburden pressure. While the long period source level is rather insensitive to this parameter, at low confining pressures tension cracks open and the source spectrum becomes strongly peaked near 1 Hz.
- Seismic Detection and Detectors