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  • Other Sources  (6,321)
  • Man/System Technology and Life Support  (6,217)
  • Chaotic behaviour
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  • 1
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    In:  Geophys. Res. Lett., Hannover, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 18, no. 7057, pp. 2011-2014, pp. L03607
    Publication Date: 1991
    Keywords: Seismicity ; Chaotic behaviour ; Statistical investigations ; Modelling ; GRL
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  • 2
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    In:  J. Geophys. Res., Beijing, Pergamon, vol. 108, no. B6, pp. ESE 4-1 to ESE 4-21, pp. 2307
    Publication Date: 2003
    Description: We analyze evolving stress and seismicity generated by three realizations of a discrete model of a strike-slip fault in a 3D elastic half-space using five functions of stress and five functions of seismicity. The first model (F) has realistic dynamic weakening (static minus dynamic frictions), the second (FC) has zero critical dynamic weakening, and the third (SYS) is constrained to produce only system-size events. The results for model F show cyclical development, saturation, and destruction of fluctuations and long range correlations on the fault, punctuated by the system-size events. The development stage involves evolution of stress and seismicity to distributions having broad ranges of scales, evolution of response functions toward scale-invariant behavior, increasing seismicity rate and event sizes, and increasing hypocenter diffusion. Most functions reach asymptotically stable values around 2/3 of the cycle and then fluctuate until one event cascades to become the next large earthquake. In model FC the above evolution is replaced by scale-invariant statistical fluctuations, while in model SYS the signals show simple cyclic behavior. The results suggest that large earthquake cycles on heterogeneous faults with realistic positive dynamic weakening are associated with intermittent criticality, produced by spontaneous evolution of stress heterogeneities toward a critical level of disorder having a broad range of scales. The stress evolution and development of large earthquake cycles may be tracked with seismicity functions.
    Keywords: Recurrence of earthquakes ; Chaotic behaviour ; SOC ; Inhomogeneity ; Fault zone ; Stress ; Seismicity ; 3220 ; Mathematical ; Geophysics: ; Nonlinear ; dynamics ; 7209 ; Seismology: ; Earthquake ; dynamics ; and ; mechanics ; 7223 ; Seismic ; hazard ; assessment ; and ; prediction ; 7260 ; Theory ; and ; modeling ; 8164 ; Tectonophysics: ; Stresses--crust ; and ; lithosphere ; JGR
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  • 3
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    In:  Geophys. Res. Lett., Basel, Birkhäuser Verlag, vol. 27, no. 5, pp. 597-600, pp. 2342, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2000
    Keywords: Seismicity ; Statistical investigations ; Chaotic behaviour ; SOC ; Earthquake precursor: prediction research ; Earthquake precursor: statistical anal. of seismicity ; 3220 ; Mathematical ; geophysics ; (new ; field) ; Nonlinear ; dynamics ; 7223 ; Seismology ; Seismic ; hazard ; assessment ; and ; prediction ; 7260 ; Theory ; and ; modeling ; Modelling ; Earthquake hazard ; Non-linear effects ; Dynamic ; GRL
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  • 4
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    In:  J. Geodynamics, Basel, Birkhäuser Verlag, vol. 35, no. 1-2, pp. 157-172, pp. 2342, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2003
    Keywords: Seismicity ; Vogtland ; Seismology ; SOC ; Chaotic behaviour ; JGD
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  • 5
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    In:  J. Geophys. Res., Basel, Birkhäuser Verlag, vol. 107, no. B12, pp. ESE 5-1 to ESE 5-9, pp. 1029, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2002
    Keywords: Earthquake ; FractureT ; Chaotic behaviour ; spring ; block ; Modelling ; Germany ; Czech ; Republic ; JGR
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  • 6
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    In:  Geophys. Res. Lett., Taipei, Ges. f. Geowissenschaften e.V., vol. 17, no. 11-12, pp. 223-226, pp. 1307, (ISSN 0343-5164)
    Publication Date: 1990
    Keywords: Earthquake precursor: prediction research ; Chaotic behaviour ; GRL
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  • 7
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    In:  Geophys. J. Int., Taipei, Ges. f. Geowissenschaften e.V., vol. 111, no. 11-12, pp. 259-269, pp. 1307, (ISSN 0343-5164)
    Publication Date: 1992
    Keywords: Chaotic behaviour ; FractureT ; Seismicity ; Statistical investigations ; SOC ; GJI
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  • 8
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    In:  Nippon Kenchiku Gakkai Kozokei Ronbunshu (Journal of Structural and Construction Engineering), Amsterdam, Elsevier Scientific Publishing Company, vol. 33, no. 498, pp. 59-66, pp. 2265, (ISSN: 1340-4202)
    Publication Date: 1997
    Description: An earthquake early warning system has been developed to obtain real-time profile of impending ground motion in order to minimize earthquake hazard. The system is designed to analyze the P-wave portion of earthquake signal and instantaneously evaluate earthquake parameters such as magnitude, epicentral distance and focal depth. Neural networks are employed to add self-learning functions to the existing system and to reduce the error of estimation for site-specific applications. The neural network has been successfully trained with recorded data to produce accurate and informative earthquake parameters.
    Keywords: Early warning systems (earthquakes, volcanic eruptions, tsunamis etc.) ; Seismology ; Chaotic behaviour ; Data analysis / ~ processing ; Japan ; Artificial intelligence (AI) ; Seismometer ; Waves ; Magnitude ; Source parameters ; Detectors ; Seismic networks ; computer ; application ; system ; Instruments
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  • 9
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    In:  Phys. Earth Plan. Int., New York, Allerton Press, vol. 61, no. 1-4, pp. 1-7, pp. 2152, (ISSN: 1340-4202)
    Publication Date: 1990
    Keywords: Chaotic behaviour ; Non-linear effects ; Earthquake precursor: prediction research ; FractureT ; PEPI
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  • 10
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    In:  Bull. Seism. Soc. Am., San Francisco, Pergamon, vol. 85, no. B3, pp. 1299-1308, pp. 1447, (ISSN: 1340-4202)
    Publication Date: 1995
    Keywords: Chaotic behaviour ; Statistical investigations ; Earthquake hazard ; Gutenberg-Richter magnitude frequency b-value ; FractureT ; b-value ; fractal ; Rock mechanics ; BSSA
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