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  • Articles  (2)
  • San Andreas fault  (1)
  • slide-blocks  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Chaotic seismic faulting with a mass-spring model and velocity-weakening friction (1992)
    Springer
    Pure and applied geophysics 138 (1992), S. 569-589 
    Details
    ISSN: 1420-9136
    Keywords: Seismicity ; slide-blocks ; chaos ; earthquakes ; fractals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract We present a systematic analysis of the dynamical behavior introduced by fault zone heterogeneities, using a simple mass-spring model with velocity-weakening friction. The model consists of two sliding blocks coupled to each other and to a constant velocity driver by clastic springs. The state of this system can be characterized by the positions of the two blocks relative to the driver. Symmetry stabilizes the system and generates only cyclic behavior. For an asymmetric system where the frictional forces for the two blocks are not equal, the solutions exhibit chaotic behavior. The transition from stable cyclic behavior to chaos is characterized by the period-doubling route to chaos. Lyapunov exponents are computed to quantify the deterministic chaos and to locate the onset of the chaotic evolution in parameter space. In many examples of deterministic chaos, chaotic behavior of a low-order system implies chaos in similar higher order systems. Thus, our results provide substantial evidence that crustal deformation is an example of deterministic chaos.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876339
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stress accumulation and release on the San Andreas fault (1977)
    Springer
    Pure and applied geophysics 115 (1977), S. 413-427 
    Details
    ISSN: 1420-9136
    Keywords: Stress in lithosphere ; San Andreas fault ; Viscoelastic relaxation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The San Andreas fault can be divided into locked and free sections. On the locked sections accumulated slip is released in great earthquakes. On the free sections slip is occurring continuously either aseismically or during smaller earthquakes. Stress drops during earthquakes can be estimated from the ratio of short to long period amplitudes and from surface strain. Surface heat flow may provide an upper bound on the absolute stress. The failure or yield stress must reach a maximum at some depth on the fault. This maximum may occur in the near-surface brittle zone or deeper in the plastic zone of the fault. The historic distribution of seismic activity provides information on the stress level. The accumulation of strain and stress on the fault can be predicted using elastic theory. It is necessary, however, to include the viscous coupling of the lithosphere to the asthenosphere in order to fully model the problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01637118
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    Paper (German National Licenses)
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