Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; August 1975; v. 65; no. 4; p. 845-854
© 1975 Seismological Society of America
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Epicentral deformation based on the dilatancy-fluid diffusion model

SHRI KRISHNA SINGH and FEDERICO J. SABINA

INSTITUTO DE GEOFISICA UNIVERSIDAD NAL. AUTONOMA DE MEXICO, C.U., MEXICO 20, D.F.
INSTITUTO DE INGENIERIA UNIVERSIDAD NAL. AUTONOMA DE MEXICO, C.U., MEXICO 20, D.F.

Abstract

The dilatancy-fluid diffusion model of the earthquake mechanism implies deformation of the epicentral area. Based on a result in the theory of thermoelasticity, we present a method for computing such deformation. Details are given for a dilating sphere and a dilating infinite cylinder buried in an elastic half-space. Given the volumetric strain of the dilatant region, the deformation measurements could be used to estimate the magnitude of the impending earthquake. Alternatively, a constraint on the volumetric strain can be obtained from deformation measurements before earthquakes that are preceded by dilatancy.






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Copyright © 1975 by the Seismological Society of America.