Experimental spectral analysis of SALMON/STERLING decoupling. Technical report

Technical Report · Fri Nov 30 04:00:00 EST 1979

OSTI ID:5479865

Blandford, R R; Woolson, J R

Re-analysis of SALMON and STERLING initial short-period compressional and surface waves at station PLMS (Poplarville, Mississippi) at a distance of 27 km shows a SALMON/STERLING compressional phase spectral ratio tending to a ratio of only 17 at 25 Hz in agreement with the theoretical caculations of Patterson (1966) and of Healy, King, and 0'Neill (1971). The spectral ratio for the surface waves tends to a ratio of approximately 100 at 25 Hz, in agreement with spectral ratios previously reported by Springer, Denny, Healy, and Mickey (1968), whose data window at PLMS was large enough to consist predominantly of surface waves. The fact that the ratio varies as a function of phase suggests that decoupling varies as a function of takeoff angle, with the least decoupling occurring at high frequencies for the most steeply departing rays. Another topic discussed is the apparent variation in decoupling as defined by the ratio of STERLING/STERLING HE. The variation in this ratio is determined to be explainable by the variation in short point between these two explosions, and not necessarily by a variation in decoupling as a function of azimuth.

• Research Organization: Teledyne Geotech, Alexandria, VA (USA). Seismic Data Lab.
• OSTI ID: 5479865
• Report Number(s): AD-A-097817/1; SDAC-TR-79-3
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450201* -- Military Technology
Weaponry
& National Defense-- Nuclear Explosions & Explosives-- Containment
DECOUPLING
EXPLOSIONS
GRAPHS
INTERACTIONS
NUCLEAR EXPLOSIONS
SALMON EVENT
SEISMIC WAVES
STERLING EVENT
VELA PROJECT
WAVE PROPAGATION