Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; February 1969; v. 59; no. 1; p. 381-384
© 1969 Seismological Society of America
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Steketee's paradox

J. C. SAVAGE

GEOPHYSICS LABORATORY UNIVERSITY OF TORONTO, TORONTO 5, ONTARIO, Canada

Abstract

Steketee noted that in a medium subject to invariable stresses at its boundaries, the introduction of a dislocation surface would always increase the strain energy of the medium. This has been misunderstood to imply that the introduction of a dislocation surface in that situation cannot represent rupture since rupture must be an energy-releasing process. It is shown here that the introduction of a dislocation surface can indeed cause a drop in mechanical energy if the entire system is considered. The proof is formulated in terms of internal strain which, of course, is the appropriate formulation of the earthquake problem.






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Copyright © 1969 by the Seismological Society of America.