HENDERSON, J and MAIN, I and MEREDITH, P and SAMMONDS, P (1992) THE EVOLUTION OF SEISMICITY AT PARKFIELD - OBSERVATION, EXPERIMENT AND A FRACTURE-MECHANICAL INTERPRETATION. J STRUCT GEOL , 14 (8-9) 905 - 913.
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We compare observations of local seismicity sequences with acoustic emissions during rock fracture, and find similarities in the distribution of event magnitudes which lead us to consider a model of seismicity which is characterized by fracture-growth laws derived from the field of fracture-mechanics and which include both negative and positive feedback processes. We find that the model predicts the observed negative correlation between the seismic b-value and the fractal dimension of the earthquake epicentres. The simple short-range interactions described in the model give rise to a system with a long-range order, similar to current models of critical processes.
|Title:||THE EVOLUTION OF SEISMICITY AT PARKFIELD - OBSERVATION, EXPERIMENT AND A FRACTURE-MECHANICAL INTERPRETATION|
|Keywords:||SELF-ORGANIZED CRITICALITY, B-VALUE, MODEL, EARTHQUAKE, FAILURE, STRESS, DEFORMATION, GRANITE, ROCK|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences|
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