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Evidence for chaotic fault interactions in the seismicity of the San Andreas fault and Nankai troughThe dynamical behavior introduced by fault interactions is examined here using a simple spring-loaded, slider-block model with velocity-weakening friction. The model consists of two slider blocks coupled to each other and to a constant-velocity driver by elastic springs. For an asymmetric system in which the frictional forces on the two blocks are not equal, the solutions exhibit chaotic behavior. The system's behavior over a range of parameter values seems to be generally analogous to that of weakly coupled segments of an active fault. Similarities between the model simulations and observed patterns of seismicity on the south central San Andreas fault in California and in the Nankai trough along the coast of southwestern Japan.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Huang, Jie (Cornell Univ. Ithaca, NY, United States)
Turcotte, D. L. (Cornell University Ithaca, NY, United States)
Date Acquired
August 15, 2013
Publication Date
November 15, 1990
Publication Information
Publication: Nature
Volume: 348
ISSN: 0028-0836
Subject Category
Distribution Limits