Table of Contents
ISRN Geophysics
Volume 2014, Article ID 160378, 7 pages
Research Article

Water Effects on the First-Order Transition in a Model of Earthquakes

Laboratory of Mechanics and Modelling of Physical Systems, Department of Physics, University of Dschang, P.O. Box 69, Dschang, Cameroon

Received 15 November 2013; Accepted 21 January 2014; Published 16 March 2014

Academic Editors: E. Del Pezzo, E. Liu, and A. Stovas

Copyright © 2014 M. W. Dongmo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The study of 1D spring-block model of earthquake dynamics with consideration of water effects in preexisting fault deals with new forms of frictional force. An analytical study of the equation of motion enables us to establish that motion of geological fault is accelerated by water pressure. In the same setting the critical value of frictional velocity for which appears the discontinuous (first-order) transition from a stick-slip behavior to a creep motion strongly depends on water pressure. The investigation also displays the magnitude and probability of events as a function of water pressure; these two quantities decrease and increase, respectively, with the variation of water pressure.