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| Scala, A.; Lorito, S.; Romano, F.; Murphy, Shane; Selva, J.; Basili, R.; Babeyko, A.; Herrero, A.; Hoechner, A.; Lovholt, F.; Maesano, F. E.; Perfetti, P.; Tiberti, M. M.; Tonini, R.; Volpe, M.; Davies, G.; Festa, G.; Power, W.; Piatanesi, A.; Cirella, A.. |
| The complexity of coseismic slip distributions influences the tsunami hazard posed by local and, to a certain extent, distant tsunami sources. Large slip concentrated in shallow patches was observed in recent tsunamigenic earthquakes, possibly due to dynamic amplification near the free surface, variable frictional conditions or other factors. We propose a method for incorporating enhanced shallow slip for subduction earthquakes while preventing systematic slip excess at shallow depths over one or more seismic cycles. The method uses the classic k(-2) stochastic slip distributions, augmented by shallow slip amplification. It is necessary for deep events with lower slip to occur more often than shallow ones with amplified slip to balance the long-term... |
| Tipo: Text |
Palavras-chave: Tsunamis; Seismic-probabilistic tsunami hazard assessment; Tsunami source models; Stochastic seismic slip distributions. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00619/73097/72233.pdf |
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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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