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| Herrero, A.; Murphy, Shane. |
| We propose a strategy to place a self similar slip distribution on a complex fault surface that is represented by an unstructured mesh. This is possible by applying a strategy based on the composite source model where a hierarchical set of asperities, each with its own slip function which is dependent on the distance from the asperity centre. Central to this technique is the efficient, accurate computation of distance between two points on the fault surface. This is known as the geodetic distance problem. We propose a method to compute the distance across complex non-planar surfaces based on a corollary of the Huygens’ principle. The difference between this method compared to others sample-based algorithms which precede it, is the use of a curved front at... |
| Tipo: Text |
Palavras-chave: Numerical approximations and analysis; Self-organization; Theoretical seismology. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00433/54432/55781.pdf |
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| Murphy, Shane; Herrero, A. |
| As an alternative to spectral methods, stochastic self-similar slip can be produced through a composite source model by placing a power-law scaling size-frequency distribution of circular slip dislocations on a fault surface. However these model do not accurately account for observed surface rupture behaviour. We propose a modification to the composite source model that corrects this issue. The advantage of this technique is that it accommodates the use of fractal slip distributions on non-planar fault surfaces. However to mimic a surface rupture using this technique, releasing the boundary condition at the top of the fault, we observed a systematic decrease in slip at shallow depths. We propose a new strategy whereby the surface is treated like a... |
| Tipo: Text |
Palavras-chave: Numerical approximations and analysis; Self-organization; Theoretical seismology. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00607/71883/70580.pdf |
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