HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by LEE, F. T. Articles by NICHOLS, T. C. Search for Related Content GeoRef GeoRef Citation

Stress changes in rock from the JORUM underground nuclear explosion, September 16, 1969, Pahute Mesa, Nevada Test Site^*

U. S. GEOLOGICAL SURVEY, DENVER, COLORADO 80225

Abstract

The JORUM underground nuclear explosion, September 16, 1969, at the Nevada Test Site, induced a series of short- and long-duration stress changes in the nearby rock. These changes were monitored with solid-inclusion three-dimensional probes that were emplaced in drill holes at four locations. The stress in the nearby rock mass stabilized within 2 weeks after the explosion but in all instances a relatively more tensile stress equilibrium was reached. The stress-change directions resulting from the explosion were closely aligned with prominent fault and joint-system trends. There was good agreement of changes in stress magnitude and direction with postshot seismic activity, alignment of after-shock epicenters, and structural directions. The relationship between geological features, seismic activity, and stress changes strongly suggests that the explosiontriggered release of stored tectonic strain energy is controlled by pre-existing geological conditions.

Footnotes

^* Publication authorized by the Director, U.S. Geological Survey.

This article has been cited by other articles:

				R. P. MASSE Review of seismic source models for underground nuclear explosions Bulletin of the Seismological Society of America, August 1, 1981; 71(4): 1249 - 1268. [Abstract] [PDF]

				A. M. ROGERS, D. M. PERKINS, and F. A. MCKEOWN A preliminary assessment of the seismic hazard of the Nevada Test Site region Bulletin of the Seismological Society of America, December 1, 1977; 67(6): 1587 - 1606. [Abstract] [PDF]

				D. D. DICKEY, F. A. MCKEOWN, and R. C. BUCKNAM Preliminary results of ground deformation measurements near the CANNIKIN explosion Bulletin of the Seismological Society of America, December 1, 1972; 62(6): 1505 - 1518. [Abstract] [PDF]