PMID: 11607672Apr 30, 1996Paper

The organization of seismicity on fault networks

Proceedings of the National Academy of Sciences of the United States of America
L Knopoff

Abstract

Although models of homogeneous faults develop seismicity that has a Gutenberg-Richter distribution, this is only a transient state that is followed by events that are strongly influenced by the nature of the boundaries. Models with geometrical inhomogeneities of fracture thresholds can limit the sizes of earthquakes but now favor the characteristic earthquake model for large earthquakes. The character of the seismicity is extremely sensitive to distributions of inhomogeneities, suggesting that statistical rules for large earthquakes in one region may not be applicable to large earthquakes in another region. Model simulations on simple networks of faults with inhomogeneities of threshold develop episodes of lacunarity on all members of the network. There is no validity to the popular assumption that the average rate of slip on individual faults is a constant. Intermediate term precursory activity such as local quiescence and increases in intermediate-magnitude activity at long range are simulated well by the assumption that strong weakening of faults by injection of fluids and weakening of asperities on inhomogeneous models of fault networks is the dominant process; the heat flow paradox, the orientation of the stress field, and...Continue Reading

References

Apr 30, 1996·Proceedings of the National Academy of Sciences of the United States of America·L Knopoff
Mar 17, 1995·Science·E E EhrichsS R Nagel
Jul 28, 1995·Science·C H LiuT A Witten

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Citations

Apr 30, 1996·Proceedings of the National Academy of Sciences of the United States of America·L Knopoff
Apr 30, 1996·Proceedings of the National Academy of Sciences of the United States of America·J S LangerB E Shaw

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