Title: Seismic vibration source

Abstract: A system for vibrating the earth in a location where seismic mapping is to take place, including forming a relatively shallow hole in the earth such as a hole 10 feet deep, placing a solid propellant in the hole, sealing a portion of the hole above the solid propellant with a device that can rapidly open and close to allow a repeatedly interrupted escape of gas, and igniting the propellant so that high pressure gas is created which escapes in pulses to vibrate the earth.

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Inventors: Dowler, Warren L. (Sierra Madre, CA, US)
Varsi, Giulio (Pasadena, CA, US)
Yang, Lien C. (La Canada, CA, US)

Application Number: 826326
Filing Date: 1977-08-22
Publication_date: 1979-04-10
Assignee: The United States of America as represented by the Administrator of the (Washington, DC)
Primary Class(es): 181/117 102/301, 166/63, 175/1, 181/106
Other Classes:
US Patent Ref:

968851	Aug, 1910	Illy	166/299.
3210897	Oct, 1965	Whittington	181/21.
3578008	May, 1971	Clark	102/25.
3630284	Dec, 1971	Fast et al.	102/21.
3670840	Jun, 1972	Gundlach	181/117.
3831386	Aug, 1974	Phares et al.	181/119.
4007803	Feb, 1977	Airhart	181/117.
4042063	Aug, 1977	Waters	181/119.
4051918	Oct, 1977	Rogers	181/119.
4081031	Mar, 1978	Mohaupt	102/21.

Other Refs:
Primary Examiner: Moskowitz, Nelson
Assistant Examiner:
Attorney: Mott; Monte F., Manning; John R., Grifka; Wilfred