CLOSE-IN EARTH MOTIONS, PROJECT HOBO. Final Report

Technical Report · Tue Mar 28 04:00:00 EST 1961

OSTI ID:4012591

Swift, L M; Wells, W M

Project Hobo consisted of four deep underground high explosives shots in the Oak Springs tuff of Nevada Test Site. One 100-lb, one 200-lb, and two 1000- lb charges were fired. One of the two 1000-lb shots was located at a point where the overburden depth was about 240 feet. The other shots were located under about 1000 feet of overburden. Primary measurements were those of particle velocity made at similar ranges on all shots to provide data for comparison with similar shots in salt and to explore the effect of overburden stress on wave propagation. Results of data analyses show that peak particle velocities observed in tuff were essentially identical to those produced in salt by similar shots at similar depths, and reduction of overburden stress without change of medium produces a marked reduction of peak particle velocity and an increase of pulse duration, with a less marked decrease of peak displacement. (auth)

• Research Organization: Stanford Research Inst., Menlo Park, Calif.
• NSA Number: NSA-15-025744
• OSTI ID: 4012591
• Report Number(s): UCRL-6397
• Country of Publication: United States
• Language: English

Related Subjects

GENERAL AND MISCELLANEOUS
MEASURED VALUES
MOTION
PARTICLES
PROJECT PLOWSHARE
SOILS
UNDERGROUND EXPLOSIONS
VELOCITY