Accession Number : AD0374651

Title :   SEISMIC MEASUREMENTS,

Corporate Author : AIR FORCE TECHNICAL APPLICATIONS CENTER PATRICK AFB FL

Personal Author(s) : Crocker, J. Allen ; Harris, Robert A.

Report Date : MAY 1955

Pagination or Media Count : 87

Abstract : The objective of this project was to obtain seismic data out to 35 degrees geocentric angle, and to utilize these data in the establishment of criteria peculiar to the nature and propagation of seismic energy derived from nuclear blasts. New instrumentation and techniques were tested. Instruments were set up at appropriate locations to supplement those already in existence in the Atomic Energy Detection System net. Tests were conducted at the 5000 ft depth in a mine, and the ZIPAGRAM was tested. It was found that the capability of the Atomic Energy Detection System net has been greatly extended by recent improvements, and that the seismic energy received from a given shot at any given location varies with the geology at the station, the coupling factor at ground zero, and the altitude of the shot. It is recommended that temporary stations be established in the distance range of from 20 to 40 degrees from the Nevada Proving Ground. Data obtained in this distance range are needed to calibrate the Atomic Energy Detection System stations similarly located with respect to foreign test sites. For this purpose, blasts of various energies and heights, occurring over differing geological conditions are desired. (Author)

Descriptors :   *NUCLEAR EXPLOSIONS, *UNDERGROUND EXPLOSIONS, NEVADA, SEISMIC WAVES, ROCK.

Subject Categories : Nuclear Weapons

Distribution Statement : APPROVED FOR PUBLIC RELEASE